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Japanese maple play
Japanese maple
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Japanese maple
Japanese maple
Japanese maple
Japanese maple
Japanese maple
Acer palmatum
Also known as : Palmate maple
Water
Water
Every 1-2 weeks
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Sunlight
Sunlight
Partial sun
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care guide

Care Guide for Japanese maple

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Watering Care
Watering Care
Details on Watering Care Watering Care
Fertilizing Care
Fertilizing Care
Details on Fertilizing Care Fertilizing Care
Pruning
Pruning
Trim the dead, diseased, overgrown branches in winter.
Details on Pruning Pruning
Soil Care
Soil Care
Sand, Loam, Clay, Chalky, Acidic, Neutral, Slightly alkaline, Moderately alkaline
Details on Soil Care Soil Care
Repotting
Repotting
Needs excellent drainage in pots
Details on Repotting Repotting
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Japanese maple
Water
Water
Every 1-2 weeks
Sunlight
Sunlight
Partial sun
Hardiness Zones
Hardiness Zones
3 to 10
Planting Time
Planting Time
Spring, Early summer, Fall, Early winter
question

Questions About Japanese maple

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What's the best method to water my Japanese maple?
You might want to put a garden hose at the plant base to ensure that you're promoting excellent root development. Avoid directly spraying the leaves, and know that the leaves will require more watering if they are outdoors and facing direct sunlight. You can also use bubblers that you can put on to each plant to moisten the roots. Also, use soaker hoses that can cover the entire garden or bed when adding or removing plants to push the roots deeply. Drain any excess water and wait for the soil to dry before watering. Water at ground level to prevent diseases. On a sunny day, you might want to spray the entire bush with water. Whether potted or in-ground, please remember Japanese maple prefers deep watering over light sprinkling.
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What should I do if I water Japanese maple too much/too little?
An overwatered Japanese maple can start to have leaves that turn yellow, drop off and wilt. The plant can also look dull and unhealthy, with signs of mushy stems. When they are beginning to show these signs, it's best to adjust your schedule whenever possible. The wilting can also be a sign of under watering as well. You might see that the leaves begin to turn crispy and dry while the overwatered ones will have soft wilted leaves. Check the soil when it is dry and watering is not enough, give it a full watering in time. Enough water will make the Japanese maple recover again, but the plant will still appear dry and yellow leaves after a few days due to the damaged root system. Once it return to normal, the leave yellowing will stop . Always check the moisture levels at the pot when you have the Japanese maple indoors. Avoid overwatering indoors and see if there are signs of black spots. If these are present, let the soil dry in the pot by giving it a few days of rest from watering. Overwatering can lead to root rot being present in your plant. If this is the case, you might want to transfer them into a different pot, especially if you see discolored and slimy roots. Always prevent root rot as much as possible, and don't let the soil become too soggy. You should dig a little deeper when you plant your Japanese maple outdoors. When you check with your fingers and notice that the soil is too dry, it could mean underwatering. Adequate watering is required to help the plant recover.
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How often should I water my Japanese maple?
The Japanese maple likes deep and infrequent watering. You would want to soak them in a gallon of water each time, especially when they are planted in pots. The water storage of flower pots is limited and the soil will dry out faster. Watering is required every 3 to 5 days when living in a cold region. Water it early in the morning when the soil is dry, outdoors or indoors. You can also determine if watering is needed by checking the soil inside. When the top 2-3 inches of soil is dry, it is time to give the plant a full watering. During hot days, you may need to check the moisture daily, as the heat can quickly dry out the soil in the pot. Irrigation of the soil is also required if you have a garden. When you live in a hot climate, you might want to water once a week. Only water when you notice that about 2 to 3 inches of soil become too dry outdoors or indoors. Consider the amount of rainwater on the plant and ensure not to add to it to prevent root rot.You may not need additional watering of the plants if there is a lot of rainfall.Japanese maple generally grows during spring and fall. When they are outdoors, you need to add mulch about 3 to 4 inches deep to conserve more water. You need to water the plants more frequently in sandy soil because this type tends to drain faster. However, with the clay one, you need to water this less frequently where you could go for 2-3 days to dry the plant and not develop any root rot. You could mark the date on the calendar whenever you water and when you notice that the leaves are starting to droop. This can mean that you might be a day late.
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How much water do I need to give my Japanese maple?
The Japanese maple generally needs about a gallon of water each schedule,With the potted plants, you might want to water them deeply until you see that the water is dripping at the bottom of the pot. Then, wait for the soil to dry before watering them again. You can use a water calculator or a moisture meter to determine the amount you've given to your plant in a week. Provide plenty of water, especially in the flowering period, but let the moisture evaporate afterwards to prevent root rot. If Japanese maple is planted outdoor with adequate rainfall, it may not need additional watering. When Japanese maple is young or newly planted, make sure it gets 1-2 inches of rain per week. As Japanese maple continues to grow, it can survive entirely on rainfall. Only when the weather is too hot, or when there is no rainfall at all for 2-3 weeks, then consider giving Japanese maple a full watering during the cooler moment of the day to prevent the plant from suffering from high heat damage. Additional watering will be required during persistent dry spells.
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Should I adjust the watering frequency for my Japanese maple according to different seasons or climates?
The Japanese maple needs outdoors come from rain, with only persistent dry weather requiring watering. Throughout the spring and fall growing seasons, the soil needs to be kept moist but not soggy, and alternating dry and moist soil conditions will allow the Japanese maple to grow well. Throughout the summer, hot weather can cause water to evaporate too quickly, and if there is a lack of rainfall, you will need to water more frequently and extra to keep it moist. Usually, the Japanese maple will need less water during the winter. Since the Japanese maple will drop their leaves and go dormant, you can put them into a well-draining but moisture-retentive soil mixture like the terracotta to help the water evaporate quicker. Once your Japanese maple growing outdoors begins to leaf out and go dormant, you can skip watering altogether and in most cases Japanese maple can rely on the fall and winter rains to survive the entire dormant period. After the spring, you can cultivate your Japanese maple and encourage it to grow and bloom when the temperature becomes warmer.This plant is not generally a fan of ponding or drought when flowering. You must ensure that the drainage is good at all times, especially during the winter. When the plant is in a pot, the plant has limited root growth. Keep them well-watered, especially if they are planted in pots during summer. They don't like cold and wet roots, so provide adequate drainage, especially if they are still growing. It's always best to water your Japanese maple’s diligently. Get the entire root system into a deep soak at least once or twice a week, depending on the weather. It's best to avoid shallow sprinkles that reach the leaves since they generally encourage the growth of fungi and don't reach deep into the roots. Don't allow the Japanese maple’s to dry out completely in the fall or winter, even if they are already dormancy. Don't drown the plants because they generally don't like sitting in water for too long. They can die during winter if the soil does not drain well. Also, apply mulch whenever possible to reduce stress, conserve water, and encourage healthy blooms.
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What should I be careful with when I water my Japanese maple in different seasons, climates, or during different growing periods?
If planting in the ground, Japanese maple mostly relies on rain. However, if there is no rainfall for 2-3 weeks, you may need to give proper consideration to giving the plants a deep watering. If watering Japanese maple in summer, you should try to do it in the morning. A large temperature difference between the water temperature and the root system can stress the roots. You need to avoid watering the bushes when it's too hot outside. Start mulching them during the spring when the ground is not too cold. The age of the plants matter. Lack of water is one of the most common reasons the newly planted ones fail to grow. After they are established, you need to ease off the watering schedule. Reduce watering them during the fall and winter, especially if they have a water-retaining material in the soil. The dry winds in winter can dry them out, and the newly planted ones can be at risk of drought during windy winter, summer, and fall. Windy seasons mean that there's more watering required. The ones planted in the pot tend to dry out faster, so they need more watering. Once you see that they bloom less, the leaves begin to dry up. Potted plants are relatively complex to water and fluctuate in frequency. Always be careful that the pot-planted plant don't sit in the water. Avoid putting them in containers with saucers, bowls, and trays. Too much watering in the fall can make the foliage look mottled or yellowish. It's always a good idea to prevent overwatering them regardless of the current climate or season that you might have. During the months when Japanese maple begins to flower, you might want to increase the watering frequency but give it a rest once they are fully grown. Give them an adequate amount of water once every 3 to 5 days but don't give them regular schedules. Make sure the soil is dry by sticking your finger in the pot, or use a moisture meter if you're unsure if it's the right time. Too much root rot can cause them to die, so be careful not to overwater or underwater regardless of the climate or season you have in your area.
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Why is watering my Japanese maple important?
Watering the Japanese maple helps transport the needed nutrients from the soil to the rest of the plant. The moisture will keep this species healthy if you know how much water to give. The watering requirements will depend on the weather in your area and the plant's soil. The Japanese maple thrives on moist soil, but they can't generally tolerate waterlogging. Ensure to provide enough mulch when planted on the ground and never fall into the trap of watering too little. They enjoy a full can of watering where the water should be moist at the base when they are planted in a pot to get the best blooms. If they are grown as foliage, you need to water them up to a depth of 10 to 20 inches so they will continue to grow. If it's raining, refrain from watering and let them get the nutrients they need from the rainwater.
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Key Facts About Japanese maple

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Attributes of Japanese maple

Lifespan
Perennial
Plant Type
Tree, Shrub
Planting Time
Spring, Early summer, Fall, Early winter
Bloom Time
Spring
Harvest Time
Fall
Plant Height
4 m to 15 m
Spread
6 m
Leaf Color
Green
Red
Orange
Yellow
Variegated
Gold
Purple
Brown
Flower Size
6 mm to 8 mm
Flower Color
Red
Purple
Fruit Color
Red
Brown
Green
Stem Color
Green
Red
Orange
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
0 - 35 ℃
Growth Season
Spring
Growth Rate
Slow

Name story

Japanese maple
Palmate maple

Symbolism

Usages

Environmental Protection Value
Garden Use

Trivia and Interesting Facts

Scientific Classification of Japanese maple

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pests

Common Pests & Diseases About Japanese maple

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Common issues for Japanese maple based on 10 million real cases
Powdery mildew
Powdery mildew
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
Brown spot
Brown spot Brown spot
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Plant dried up
Plant dried up Plant dried up
Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Solutions: The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Scars
Scars Scars
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Fruit withering
Fruit withering Fruit withering
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Black spot
Black spot Black spot
Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
Solutions: Some steps to take to address black spot include: Prune away any infected leaves, cleaning the pruners between plants with a 10% bleach solution so that the fungus does not spread to healthy leaves. Don't compost pruned plant parts as the spores can linger in the soil for a long period of time - instead, dispose of them in the trash. Use an approved fungicide such as Trifloxystrobin, Chlorothalonil, Maneb, or Myclobutanil. Use a spreader in the fungicide spray to ensure better coverage.
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Powdery mildew
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Powdery mildew Disease on Japanese maple?
What is Powdery mildew Disease on Japanese maple?
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
Symptom Analysis
Symptom Analysis
For Japanese maple, powdery mildew usually starts as white spores on the leaf surface, which later form powdery spots. These spots can spread and cover the branch, leading to leaf fall, reduced growth, and sometimes, branch death.
What Causes Powdery mildew Disease on Japanese maple?
What Causes Powdery mildew Disease on Japanese maple?
1
pathogen
Powdery mildew in Japanese maple is mainly caused by the fungus Microsphaera penicillata.
2
Environmental factors
Conditions such as high humidity, low light, and poor air circulation, often favored by dense plantings and excessive watering, also encourage its spread.
How to Treat Powdery mildew Disease on Japanese maple?
How to Treat Powdery mildew Disease on Japanese maple?
1
Non pesticide
Plant selection: Choose disease-resistant varieties of Japanese maple for your landscape.

Cultural practices: Ensure adequate spacing between plants for good air circulation and avoid wetting leaves during watering.
2
Pesticide
Fungicide application: Carefully apply a suitable fungicide following label instructions. Several applications may be necessary during the growing season.

Biological control: Some commercial products contain beneficial fungi or bacteria that can control powdery mildew.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
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Plant dried up
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Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Symptom Analysis
Symptom Analysis
Your plant has dried out and turned brown. It might be starting to wilt, with no noticeable green around the stems and leaves. Touch the leaves, and they may crinkle under your fingers.
Possible causes of a dried out plant include:
  1. Not enough water. A lack of water will lead to dry plant tissue.
  2. Too much water. Watering too much can lead to root rot which makes the plant struggle to take up water. Rotted, mushy roots are a sign of overeating.
  3. Entering dormancy. As perennial plants enter their resting period known as dormancy, their leaves dry out and may fall off. This happens during decreasing day length.
  4. Exposure to herbicides and other toxic substances. If a plant is hit with a large dose herbicide or other toxic chemical, the plant will turn brown.
  5. Too much fertility. An excess of fertilizer can prevent plants from taking up water, leading to drying.
  6. Improper sun exposure. Just like humans, plants can get sunburn by intense, direct light. Plants can also dry out if they don’t receive enough light.
To determine whether the plant is still alive and can be saved, you can:
  1. Bend a stem. If the stem is pliable, the plant is still alive. If the stem breaks, the plant is dead.
  2. Gently scratch the stem with your fingernail for signs of green inside. If your plant is dead, the stem will be brittle and brown throughout.
  3. Cut the stems back a little bit a time for visible green growth. If none of the stems have visible green growth, the plant is dead.
Solutions
Solutions
The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method.
  1. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly.
  2. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems.
  3. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species.
  4. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil.
  5. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Prevention
Prevention
Prevention involves providing your plant with the proper environment.
  1. Provide the proper amount of water. The amount of water depends on a plant’s size, species, and environment. A general rule is to allow soil to dry out between waterings.
  2. Place plants in the proper environment. Provide the proper hours of sun and temperature for your individual plant.
  3. Provide proper fertility. Most plants only need to be fertilized once or twice a year; don’t overapply.
  4. Keep plants free from toxic substances. Keep herbicides and toxic household chemicals away from your plants.
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Scars
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Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Fruit withering
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Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
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Black spot
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Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
Overview
Overview
Black spot is a fungus that largely attacks leaves on a variety of ornamental plants, leaving them covered in dark spots ringed with yellow, and eventually killing them. The fungus is often simply unsightly, but if it infects the whole plant it can interfere with photosynthesis by killing too many leaves. Because of this, it is important to be aware of the best methods for preventing and treating this diseases should it occur in the garden.
Symptom Analysis
Symptom Analysis
Here are a few of the most common symptoms of black spot:
  • The plant has developed small black spots along the leaves.
  • These spots be small, circular, and clustered together, or they may have a splotchy appearance and take up large portions of the leaves.
  • The fungus may also affect plant canes, where lesions start purple and then turn black.
  • The plant may suffer premature leaf drop.
Though most forms of black spot fungus pose little risk to a plant's overall health, many gardeners find them unsightly. Severe cases can also weaken a plant, so it becomes more susceptible to other pathogens and diseases.
Disease Cause
Disease Cause
Black spot is spread by various types of fungi, which differ slightly depending on whether they are in their sexual or asexual stages.
The fungal spores linger over the winter in fallen leaves and lesions on canes. In the spring, the spores are splashed up onto the leaves, causing infection within seven hours of moisture and when temperatures range between 24 to 29 ℃ with a high relative humidity.
In just two weeks, thousands of additional spores are produced, making it easy for the disease to infect nearby healthy plants as well.
There are several factors that could make a plant more likely to suffer a black spot infection. Here are some of the most common:
  • Exposure to infected plants or mulch (the fungus overwinters on dead leaves)
  • Weakening from physical damage, pest infestation or other infections.
  • Increased periods of wet, humid, warm weather – or exposure to overhead watering
  • Plants growing too close together
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weed

Weed Control About Japanese maple

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Weeds
Widely known for its red autumn leaves, japanese maple is a common ornamental tree. However, purposeful cultivation and rapid spread have placed it on the watch list in several areas, and some countries list it as an invasive species.
How to Control it
Japanese maple can spread very far due to the fact that the seeds are aerodynamic and can be easily dispersed by wind. This means that you can find its saplings in your garden even if there are no japanese maple trees nearby. One easy way to control its growth is to pull the saplings out of the soil along with the roots. If you have unwanted mature trees in the garden, you can cut them down and apply herbicides on the stump to prevent them from regrowing. Consult an agricultural expert before picking the active substance to find the best product and application method for your geographical region. Read the instructions on the product label and follow them carefully. Apply the herbicide on the stump only, and spray on a windless day to avoid drift.
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distribution

Distribution of Japanese maple

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Habitat of Japanese maple

Woods, thickets, lowland, mountains
Northern Hemisphere
South Hemisphere

Distribution Map of Japanese maple

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Japanese Maple Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Water
Every 1-2 weeks
Japanese maple originates from the forests of Japan, Korea, and China, where it experiences moderate to high rainfall spread throughout the year, up to 60 inches annually. Moisture levels in these locales remain relatively consistent, which japanese maple has evolved to favor. This plant thrives on steady, evenly distributed watering without over-saturation, echoing the precipitation patterns of its natural habitat. Extremely dry periods can stress japanese maple, reinforcing the need for consistent moisture.
Watering Techniques
Lighting
Partial sun
Japanese maple's sunlight needs are flexible; it can tolerate both areas bathed in light and areas that receive filtered light throughout the day. This adaptability originates from its home environment, with diverse light conditions. Insufficient lighting may reduce leaf coloration, while excessive can cause leaf scorch.
Best Sunlight Practices
Transplant
10-25 feet
The best time to transplant japanese maple is from late spring to mid-summer, as it gives the plant ample time to establish and thrive. Choose a location with partial shade and well-draining soil. Remember to keep the roots moist during the process for optimal transplant success.
Transplant Techniques
Temperature
-30 - 41 ℃
Japanese maple grows best in a temperate climate with a preferred temperature range of 32 to 95 ℉ (0 to 35 ℃). It is native to Japan where the temperature ranges from 23 to 81 ℉ (-5 to 27 ℃). During the hot summer months, it is recommended to provide shade and ample water to help the plant adjust to the high temperatures. In colder conditions, it is best to protect the roots with mulch and provide wind barriers to prevent cold damage.
Temp for Healthy Growth
Pruning
Spring, Winter
Famed for its graceful foliage and vibrant colors, japanese maple benefits from pruning to maintain shape and health. Key techniques include thinning cuts to improve light penetration and air flow, along with corrective pruning to remove dead or crossing branches. Timing is critical; prune in late winter or early spring to minimize sap loss and disease risk. Pruning japanese maple also encourages more vigorous growth and enhances its natural structure, making it a vital aspect of care for this ornamental species.
Pruning techniques
Propagation
The optimal period for propagating japanese maple through cutting is autumn, after leaf fall. Cooler temperatures and lower light intensity favor root development without stimulating excess foliage growth. This timing leverages japanese maple's natural dormancy cycle, enhancing the chances of successful rooting before spring. Reliable sources confirm this as the period of increased root growth potential while maintaining plant health.
Propagation of japanese maple is best done in Autumn and Winter using the hardwood cutting method, layering or sowing seeds. Propagation difficulty is moderate but signs of successful propagation include establishment and new foliage growth. Key tips involve keeping the soil moist, avoiding drying out or overwatering, and providing the plant with enough light.
Propagation Techniques
Powdery mildew
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
Read More
Leaf blight
Leaf blight is a common plant disease that significantly impacts Japanese maple's health. This disease, caused by fungal pathogens, leads to discoloration and wilting of leaves, thereby impacting the aesthetic quality and overall vitality of the plant.
Read More
Brown blotch
Brown spot is a fungal disease affecting Japanese maple, causing browning, withering, and premature dropping of leaves. If untreated, it can severely damage and potentially kill the plant. It's crucial to apply suitable control and prevention measures timely.
Read More
Leaf rot
Leaf rot is a fungi-borne disease majorly impairing Japanese maple's health, leading to foliage yellowing, wilting, and even plant death. Its impact is seen spatially on the leaves and could potentially make the plant lose its aesthetic value.
Read More
Caterpillars
Caterpillars, or insect larvae, pose a significant threat to Japanese maple by causing defoliation and overall deterioration. Brought about by moth species, these pests transpose into a grave problem for Japanese maple resulting in consequent destruction and leaf damage.
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Wilting
Wilting is a plant disease characterized by a lack of strength and appearance in the leaves, often leading to decay and death of the plant. It strongly affects Japanese maple, hindering growth and potentially leading to the plant's demise if untreated.
Read More
Leaf tip withering
Leaf tip withering is a condition affecting Japanese maple. It is generally a consequence of environmental stress, leading to malnourishment of the plant, ultimately causing wilting and browning of leaf tips. The disease could potentially reduce the plant's overall aesthetics and health if not addressed promptly.
Read More
Yellow edges
Yellow edges is a disease affecting the Japanese maple, causing leaf edge discoloration and potentially leading to leaf drop. It's often associated with inadequate watering, too much sunlight, or nutritional deficiencies.
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Dark blotch
Dark blotch is a fungal disease affecting Japanese maple, causing dark brown to black spots on foliage. It weakens the plant over time, and in severe cases, can lead to plant death if left untreated. This disease thrives in wet, cool conditions.
Read More
Thrips
Thrips are small insects that feed on Acer palmatum (Japanese Maple) leaves, causing distortion, discoloration, and reduced growth. Existing in high numbers, they can pose a severe threat to the plant's overall health and longevity.
Read More
Dark spots
Dark spots are a common disease in Japanese maple caused mainly by fungus infection, leading to the plant's aesthetic decline and potential health issues. Timely identification and intervention are pivotal to preventing pervasive damage and ensuring the plant's vitality.
Read More
Feng shui direction
South
Japanese maple is considered fairly compatible in Feng Shui when placed in the South direction. This is due to its vibrant colors and graceful shape, which can enhance the energy of fame and recognition associated with the South. However, individual experiences may vary.
Fengshui Details
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Plants Related to Japanese maple

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Devil's beggarticks
Devil's beggarticks
Devil's beggarticks (Bidens frondosa) is a plant species native to North America. Bidens frondosa has many common names, including devil's beggarticks, devil's pitchfork, sticktights, pitchfork weed, and common beggar-ticks. This plant has become an invasive species in New Zealand and is considered a weed there.
Pigeonberry
Pigeonberry
The pigeonberry is a vine-like herb that can reach heights of 40 to 200 cm. It produces a bright red berry as a fruit that is tested to be safe to consume. The juice made from these berries was once used as a dye and ink.
Common mallow
Common mallow
The common mallow is an ornamental plant with a large variety of cultivars. It has historically also been used to create a yellow dye. Common mallow seeds are shaped roughly like cheese wheels, leading the seeds (and sometimes the plant itself) being called "cheeses."
Common mullein
Common mullein
Common mullein (Verbascum thapsus) has been cultivated by farmers and gardeners since colonial times. This herb has a thick stem and leaves covered with a layer of “fur” that feels like flannel. Today, it grows wild in many areas of the U.S., including roadsides and vacant lots. Flowers of common mullein are occasionally brewed into a tea.
Asian copperleaf
Asian copperleaf
Asian copperleaf or Acalypha australis is a perennial weed with spikes of small, copper-red flowers. Once thought to be found only in the New York area, this weed has also been discovered throughout the United States.
Rose of sharon
Rose of sharon
Hibiscus syriacus is a deciduous shrub with trumpet-shaped pink, lavender, or white flowers. Although it was first collected by Western botanists from Syrian gardens, “rose of sharon” is native to south-central and southeastern China. Because of its hardiness and prolific blooming, it is cultivated all around the world. It is the national flower of South Korea, mentioned in its national anthem.
Poison ivy
Poison ivy
In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.
Pokeweed
Pokeweed
Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.
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Japanese maple
Acer palmatum
Also known as: Palmate maple
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Questions About Japanese maple

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
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What's the best method to water my Japanese maple?
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What should I do if I water Japanese maple too much/too little?
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Should I adjust the watering frequency for my Japanese maple according to different seasons or climates?
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Key Facts About Japanese maple

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Attributes of Japanese maple

Lifespan
Perennial
Plant Type
Tree, Shrub
Planting Time
Spring, Early summer, Fall, Early winter
Bloom Time
Spring
Harvest Time
Fall
Plant Height
4 m to 15 m
Spread
6 m
Leaf Color
Green
Red
Orange
Yellow
Variegated
Gold
Purple
Brown
Flower Size
6 mm to 8 mm
Flower Color
Red
Purple
Fruit Color
Red
Brown
Green
Stem Color
Green
Red
Orange
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
0 - 35 ℃
Growth Season
Spring
Growth Rate
Slow
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Name story

Japanese maple
Palmate maple

Symbolism

Usages

Environmental Protection Value
Garden Use

Trivia and Interesting Facts

Scientific Classification of Japanese maple

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Common Pests & Diseases About Japanese maple

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Common issues for Japanese maple based on 10 million real cases
Powdery mildew
Powdery mildew
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
Learn More About the Powdery mildew more
Brown spot
Brown spot Brown spot Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Learn More About the Brown spot more
Plant dried up
Plant dried up Plant dried up Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Solutions: The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Learn More About the Plant dried up more
Scars
Scars Scars Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Learn More About the Scars more
Fruit withering
Fruit withering Fruit withering Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Learn More About the Fruit withering more
Black spot
Black spot Black spot Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
Solutions: Some steps to take to address black spot include: Prune away any infected leaves, cleaning the pruners between plants with a 10% bleach solution so that the fungus does not spread to healthy leaves. Don't compost pruned plant parts as the spores can linger in the soil for a long period of time - instead, dispose of them in the trash. Use an approved fungicide such as Trifloxystrobin, Chlorothalonil, Maneb, or Myclobutanil. Use a spreader in the fungicide spray to ensure better coverage.
Learn More About the Black spot more
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Powdery mildew
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Powdery mildew Disease on Japanese maple?
What is Powdery mildew Disease on Japanese maple?
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
Symptom Analysis
Symptom Analysis
For Japanese maple, powdery mildew usually starts as white spores on the leaf surface, which later form powdery spots. These spots can spread and cover the branch, leading to leaf fall, reduced growth, and sometimes, branch death.
What Causes Powdery mildew Disease on Japanese maple?
What Causes Powdery mildew Disease on Japanese maple?
1
pathogen
Powdery mildew in Japanese maple is mainly caused by the fungus Microsphaera penicillata.
2
Environmental factors
Conditions such as high humidity, low light, and poor air circulation, often favored by dense plantings and excessive watering, also encourage its spread.
How to Treat Powdery mildew Disease on Japanese maple?
How to Treat Powdery mildew Disease on Japanese maple?
1
Non pesticide
Plant selection: Choose disease-resistant varieties of Japanese maple for your landscape.

Cultural practices: Ensure adequate spacing between plants for good air circulation and avoid wetting leaves during watering.
2
Pesticide
Fungicide application: Carefully apply a suitable fungicide following label instructions. Several applications may be necessary during the growing season.

Biological control: Some commercial products contain beneficial fungi or bacteria that can control powdery mildew.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
Solutions
Solutions
In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary.
Organic options won’t kill the fungus, but will prevent it from spreading.
  1. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear.
  2. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread.
  3. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Prevention
Prevention
Like many other diseases, it is easier to prevent brown spot than cure it, and this is done through cultural practices.
  • Clear fall leaves from the ground before winter to minimize places where fungi and bacteria can overwinter.
  • Maintain good air movement between plants through proper plant spacing.
  • Increase air circulation through the center of plants through pruning.
  • Thoroughly clean all pruning tools after working with diseased plants.
  • Never dispose of disease plant material in a compost pile.
  • Avoid overhead watering to keep moisture off of the foliage.
  • Keep plants healthy by providing adequate sunlight, water, and fertilizer.
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Plant dried up
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Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Symptom Analysis
Symptom Analysis
Your plant has dried out and turned brown. It might be starting to wilt, with no noticeable green around the stems and leaves. Touch the leaves, and they may crinkle under your fingers.
Possible causes of a dried out plant include:
  1. Not enough water. A lack of water will lead to dry plant tissue.
  2. Too much water. Watering too much can lead to root rot which makes the plant struggle to take up water. Rotted, mushy roots are a sign of overeating.
  3. Entering dormancy. As perennial plants enter their resting period known as dormancy, their leaves dry out and may fall off. This happens during decreasing day length.
  4. Exposure to herbicides and other toxic substances. If a plant is hit with a large dose herbicide or other toxic chemical, the plant will turn brown.
  5. Too much fertility. An excess of fertilizer can prevent plants from taking up water, leading to drying.
  6. Improper sun exposure. Just like humans, plants can get sunburn by intense, direct light. Plants can also dry out if they don’t receive enough light.
To determine whether the plant is still alive and can be saved, you can:
  1. Bend a stem. If the stem is pliable, the plant is still alive. If the stem breaks, the plant is dead.
  2. Gently scratch the stem with your fingernail for signs of green inside. If your plant is dead, the stem will be brittle and brown throughout.
  3. Cut the stems back a little bit a time for visible green growth. If none of the stems have visible green growth, the plant is dead.
Solutions
Solutions
The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method.
  1. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly.
  2. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems.
  3. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species.
  4. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil.
  5. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Prevention
Prevention
Prevention involves providing your plant with the proper environment.
  1. Provide the proper amount of water. The amount of water depends on a plant’s size, species, and environment. A general rule is to allow soil to dry out between waterings.
  2. Place plants in the proper environment. Provide the proper hours of sun and temperature for your individual plant.
  3. Provide proper fertility. Most plants only need to be fertilized once or twice a year; don’t overapply.
  4. Keep plants free from toxic substances. Keep herbicides and toxic household chemicals away from your plants.
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Scars
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Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Fruit withering
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Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
Solutions
Solutions
There are a number of appropriate solutions to control fruit withering:
  1. Remove any fruit as soon as it shows any signs of infection. Do not compost.
  2. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Prevention
Prevention
Preventative measures include:
  1. Ensuring adequate spacing between plants or trees.
  2. Staking plants that are prone to tumbling to prevent moisture or humidity build up.
  3. Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
  4. Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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Black spot
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Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
Overview
Overview
Black spot is a fungus that largely attacks leaves on a variety of ornamental plants, leaving them covered in dark spots ringed with yellow, and eventually killing them. The fungus is often simply unsightly, but if it infects the whole plant it can interfere with photosynthesis by killing too many leaves. Because of this, it is important to be aware of the best methods for preventing and treating this diseases should it occur in the garden.
Symptom Analysis
Symptom Analysis
Here are a few of the most common symptoms of black spot:
  • The plant has developed small black spots along the leaves.
  • These spots be small, circular, and clustered together, or they may have a splotchy appearance and take up large portions of the leaves.
  • The fungus may also affect plant canes, where lesions start purple and then turn black.
  • The plant may suffer premature leaf drop.
Though most forms of black spot fungus pose little risk to a plant's overall health, many gardeners find them unsightly. Severe cases can also weaken a plant, so it becomes more susceptible to other pathogens and diseases.
Disease Cause
Disease Cause
Black spot is spread by various types of fungi, which differ slightly depending on whether they are in their sexual or asexual stages.
The fungal spores linger over the winter in fallen leaves and lesions on canes. In the spring, the spores are splashed up onto the leaves, causing infection within seven hours of moisture and when temperatures range between 24 to 29 ℃ with a high relative humidity.
In just two weeks, thousands of additional spores are produced, making it easy for the disease to infect nearby healthy plants as well.
There are several factors that could make a plant more likely to suffer a black spot infection. Here are some of the most common:
  • Exposure to infected plants or mulch (the fungus overwinters on dead leaves)
  • Weakening from physical damage, pest infestation or other infections.
  • Increased periods of wet, humid, warm weather – or exposure to overhead watering
  • Plants growing too close together
Solutions
Solutions
Some steps to take to address black spot include:
  • Prune away any infected leaves, cleaning the pruners between plants with a 10% bleach solution so that the fungus does not spread to healthy leaves.
  • Don't compost pruned plant parts as the spores can linger in the soil for a long period of time - instead, dispose of them in the trash.
  • Use an approved fungicide such as Trifloxystrobin, Chlorothalonil, Maneb, or Myclobutanil.
  • Use a spreader in the fungicide spray to ensure better coverage.
Prevention
Prevention
Here are a few tips to prevent black spot outbreaks.
  • Purchase resistant varieties: Invest in fungus-resistant plant varieties to reduce the chances for black spot diseases.
  • Remove infected plant debris: Fungi can overwinter in contaminated plant debris, so remove all fallen leaves from infected plants as soon as possible.
  • Rake and discard fallen leaves in the fall.
  • Prune regularly.
  • Water carefully: Fungal diseases spread when plants stay in moist conditions and when water droplets splash contaminated soil on plant leaves. Control these factors by only watering infected plants when the top few inches of soil are dry, and by watering at soil level to reduce splashback. Adding a layer of mulch to the soil will also reduce splashing.
  • Grow plants in an open, sunny locations so the foliage dries quickly.
  • Follow spacing guidelines when planting and avoid natural windbreaks for good air circulation.
  • Use chemical control: Regular doses of a fungicide, especially in the spring, can stop an outbreak before it begins.
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Weed Control About Japanese maple

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Weeds
Widely known for its red autumn leaves, japanese maple is a common ornamental tree. However, purposeful cultivation and rapid spread have placed it on the watch list in several areas, and some countries list it as an invasive species.
How to Control it
Japanese maple can spread very far due to the fact that the seeds are aerodynamic and can be easily dispersed by wind. This means that you can find its saplings in your garden even if there are no japanese maple trees nearby. One easy way to control its growth is to pull the saplings out of the soil along with the roots. If you have unwanted mature trees in the garden, you can cut them down and apply herbicides on the stump to prevent them from regrowing. Consult an agricultural expert before picking the active substance to find the best product and application method for your geographical region. Read the instructions on the product label and follow them carefully. Apply the herbicide on the stump only, and spray on a windless day to avoid drift.
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Distribution of Japanese maple

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Habitat of Japanese maple

Woods, thickets, lowland, mountains
Northern Hemisphere
South Hemisphere

Distribution Map of Japanese maple

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Japanese Maple Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Powdery mildew
Powdery mildew
Powdery mildew is a common fungal disease that affects Japanese maple, causing a white, cottony growth on the surface of the leaves. Apart from affecting the plant's aesthetic appeal, this disease may hinder growth, especially in young, susceptible plants.
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Leaf blight
Leaf blight
Leaf blight is a common plant disease that significantly impacts Japanese maple's health. This disease, caused by fungal pathogens, leads to discoloration and wilting of leaves, thereby impacting the aesthetic quality and overall vitality of the plant.
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Brown blotch
Brown blotch
Brown spot is a fungal disease affecting Japanese maple, causing browning, withering, and premature dropping of leaves. If untreated, it can severely damage and potentially kill the plant. It's crucial to apply suitable control and prevention measures timely.
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Leaf rot
Leaf rot
Leaf rot is a fungi-borne disease majorly impairing Japanese maple's health, leading to foliage yellowing, wilting, and even plant death. Its impact is seen spatially on the leaves and could potentially make the plant lose its aesthetic value.
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Caterpillars
Caterpillars
Caterpillars, or insect larvae, pose a significant threat to Japanese maple by causing defoliation and overall deterioration. Brought about by moth species, these pests transpose into a grave problem for Japanese maple resulting in consequent destruction and leaf damage.
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Wilting
Wilting
Wilting is a plant disease characterized by a lack of strength and appearance in the leaves, often leading to decay and death of the plant. It strongly affects Japanese maple, hindering growth and potentially leading to the plant's demise if untreated.
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Leaf tip withering
Leaf tip withering is a condition affecting Japanese maple. It is generally a consequence of environmental stress, leading to malnourishment of the plant, ultimately causing wilting and browning of leaf tips. The disease could potentially reduce the plant's overall aesthetics and health if not addressed promptly.
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Yellow edges
Yellow edges is a disease affecting the Japanese maple, causing leaf edge discoloration and potentially leading to leaf drop. It's often associated with inadequate watering, too much sunlight, or nutritional deficiencies.
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Dark blotch
Dark blotch is a fungal disease affecting Japanese maple, causing dark brown to black spots on foliage. It weakens the plant over time, and in severe cases, can lead to plant death if left untreated. This disease thrives in wet, cool conditions.
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Thrips
Thrips are small insects that feed on Acer palmatum (Japanese Maple) leaves, causing distortion, discoloration, and reduced growth. Existing in high numbers, they can pose a severe threat to the plant's overall health and longevity.
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Dark spots
Dark spots are a common disease in Japanese maple caused mainly by fungus infection, leading to the plant's aesthetic decline and potential health issues. Timely identification and intervention are pivotal to preventing pervasive damage and ensuring the plant's vitality.
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Water
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Japanese Maple Watering Instructions
Japanese maple originates from the forests of Japan, Korea, and China, where it experiences moderate to high rainfall spread throughout the year, up to 60 inches annually. Moisture levels in these locales remain relatively consistent, which japanese maple has evolved to favor. This plant thrives on steady, evenly distributed watering without over-saturation, echoing the precipitation patterns of its natural habitat. Extremely dry periods can stress japanese maple, reinforcing the need for consistent moisture.
When Should I Water My Japanese Maple?
Importance of Timely Watering
Timely watering is crucial to the health and growth of japanese maple. It not only sustains everyday physiological activities but also contributes to the plant's resistance against pests and diseases. Adequate watering promotes vibrant foliage and strong root growth, all of which are vital for japanese maple's overall vitality.
Leaf Appearance
If japanese maple's leaves begin to look wilted, have a dull appearance or have brown edges, this would be a clear sign that they need to be watered. Brown or red spots may also appear when the plant is dehydrated.
Soil Moisture
Check soil dryness of japanese maple. Stick your finger into the soil, about a couple of inches deep; if it feels dry to this depth, it's a sign to water the plant. Do not wait until the entire soil mass has dried out completely.
Seasonal Changes
Japanese maple requires more water in the hot and dry summer months. If the weather is particularly dry, windy or hot, it can lead to dehydration, so watch out for environmental conditions as a cue for watering.
Plant Posture
A thirsty japanese maple may exhibit a droopy posture. If the typically firm and erect branches or twigs start to droop or sag, that might indicate the need for watering.
Risks of Incorrect Watering
Inappropriate watering can harm the japanese maple. Overwatering can cause root rot, fungal diseases, yellowing foliage, and leaf drop; underwatering can result in wilting, browning leaves, leaf scorch, and shock that can stunt the plant's growth or even cause it to die. Hence, recognizing the signs indicating the need for watering is essential.
How Should I Water My Japanese Maple?
Watering Requirements
Japanese maple requires regular watering to maintain optimal hydration. However, it is important to avoid overwatering, as this plant is sensitive to excess moisture and can develop root rot.
Watering Technique
The most effective watering technique for japanese maple is the bottom-watering method. This involves placing the plant pot in a tray or saucer filled with water and allowing the roots to absorb moisture from the bottom up. This technique prevents water from directly touching the foliage, reducing the risk of fungal diseases and leaf damage.
Special Equipment
It may be beneficial to use a moisture meter to accurately gauge the moisture level in the soil. This can help determine when it is time to water the plant. Additionally, using a watering can with a narrow spout can enable precise watering, ensuring that water reaches the base of the plant without excessively wetting the foliage.
Focus Areas
When watering japanese maple, it is important to focus on thoroughly moistening the root ball. Water should be applied directly to the soil around the base of the plant, avoiding excess water on the leaves. To prevent water from accumulating at the base of the pot, ensure proper drainage.
Nuances of Watering
It is crucial to strike a balance in watering japanese maple. While it requires regular moisture, it is equally important to allow the soil to partially dry out between watering sessions to prevent waterlogged conditions. The frequency of watering depends on various factors such as climate, pot size, and soil type. It is recommended to monitor the moisture level in the soil and adjust the watering accordingly to ensure optimal hydration.
Additional Tips
Avoid using cold or chlorinated water for japanese maple. It is best to use room temperature water or allow tap water to sit for 24 hours to allow chlorine to dissipate. Misting the foliage occasionally can help increase humidity levels around the plant, but should not be relied upon as the primary method of watering.
How Much Water Does Japanese Maple Really Need?
natural inclination
Japanese maple originates from regions in Japan, Korea, and China, where the climate is predominantly humid. These conditions have imbued it with a moderate need for water, leaning towards moisture-rich environments.
optimal water quantity
For japanese maple, the water quantity must be regulated based on several factors. Japanese maple's pot size invariably determines the volume of water it can hold and absorb. However, the size of the plant plays a crucial role as well. For a pot of approximately 12 inches in height and breadth, it is recommended to provide between 1.5 to 2 gallons of water. This amount will deepen in respect to the size of the plant and the spread of its roots. Always be sure to saturate the soil until it drains from the bottom, ensuring that the water has reached japanese maple's entire root system.
condition indicators
Japanese maple sends out clear signals of its water needs. Healthy japanese maple leaves are vibrant, and the plant displays its characteristic branching habit. If the leaves get pale, wilt, or start falling off, it might be a sign of under-watering. On the other hand, if the leaves yellow and the plant growth becomes stunted, it could indicate over-watering.
over under watering
Over-watering can lead to root rot and eventually kill japanese maple. Under-watering, meanwhile, can dehydrate the plant, causing leaf and branch drop. Both scenarios can threaten the survival of japanese maple; therefore, accurate watering remains fundamental to its health.
root depth
Japanese maple's roots can be relatively deep, urgent for a thorough watering that reaches the bottom of the pot. If the top of the soil appears dry but the underlying layers are wet, that can also be an indicator of excess water.
How Often Should I Water Japanese Maple?
Every 1-2 weeks
Watering Frequency
Smart Seasonal Watering
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Just like people, each plant has its own preferences and needs. Devote time to understanding your plants so you can nurture them properly. Observe your plants attentively, learning from their growth patterns, and becoming more in tune with their needs as you grow together. Keep a watchful eye on new plants and seedlings, as they are sensitive to both overwatering and underwatering. Shower them with gentle love and attention, fostering their growth and strength. Let the rhythm of your local climate guide your watering habits, adapting your schedule to the changing weather and the needs of your plants.
What Kind of Water is Best for Japanese Maple?
Water Type Guide for japanese maple
Water Sensitivity: Moderate - japanese maple prefers a well-draining soil and should not be excessively saturated with water.
Water Types
Rainwater: Best suited for japanese maple as it is natural, free of chemicals, and has a balanced pH level.
Distilled Water: A suitable alternative to rainwater that is free of impurities and minerals.
Filtered Water: Can be used as long as it removes any harmful contaminants.
Tap Water: Can be used if no other water sources are available, but it may contain chlorine and other chemicals that can be harmful to the plant.
Chlorine Sensitivity
High - japanese maple is sensitive to chlorine in tap water, which can cause leaf burn and overall stress to the plant.
Fluoride Sensitivity
Moderate - japanese maple may be sensitive to high levels of fluoride in tap water.
Water Treatments
Dechlorination: It is recommended to let tap water sit out for at least 24 hours before using it on japanese maple. This allows the chlorine to evaporate and makes it safer for the plant.
Water Filters: Using a water filter can help remove chlorine, fluoride, and other contaminants from tap water before using it on japanese maple.
Water Temperature Preferences
Moderate - japanese maple generally prefers water at room temperature (around 68-72°F or 20-22°C). Avoid using water that is too cold or too hot, as extreme temperatures can shock the plant.
How Do Japanese Maple's Watering Needs Change with the Seasons?
How to Water japanese maple in Spring?
In spring, japanese maple embarks on its active growth period, resulting in increased water needs. It鈥檚 vital to ensure the soil around the plant is consistently moist, but not waterlogged. As the ground begins to thaw from winter cold, root activity in japanese maple resumes, requiring more hydration. However, be cautious not to overwater, as this can lead to waterlogged soil and root rot. A good practice is to water deeply to promote deeper root growth, which helps the tree to withstand summer's heat.
How to Water japanese maple in Summer?
Summer brings higher temperatures, potentially causing japanese maple's soil to dry out faster. To compensate, you may need to water your japanese maple more frequently. However, it's essential to avoid overwatering, as japanese maple doesn't cope well with overly wet conditions. Instead, you should aim to keep the soil around japanese maple consistently moist. It's recommended to water your japanese maple in the early morning or late evening when temperatures are cooler to prevent water loss due to evaporation.
How to Water japanese maple in Autumn?
Watering requirements for japanese maple reduce in autumn due to cooler temperatures and decreased growth. The plant starts preparing for dormancy during this season, so water deeply but less frequently. This watering approach will maintain a correct hydration level without promoting excessive, late-season growth that might not harden off by winter. Additionally, be mindful of autumn rains which might naturally provide sufficient water.
How to Water japanese maple in Winter?
Winter is a time of dormancy for japanese maple. Consequently, its water requirements are minimal during this season. Water only if the winter is especially dry, and the ground isn't frozen. Overwatering can cause root damage and promote fungal growth, so it's best to err on the side of dryness. Make sure to mulch around the base of the plant to help insulate the root system from extreme cold and to conserve moisture.
What Expert Tips Can Enhance Japanese Maple Watering Routine?
Watering Tools
Using a watering wand or hose with a gentle nozzle attachment can help distribute water evenly across the surface of the soil, ensuring thorough hydration without causing soil erosion or damage to delicate foliage.
Early Morning Watering
Water japanese maple early in the morning to allow the water to soak into the soil before the sun's heat increases evaporation rates. This optimizes water absorption and helps prevent moisture loss.
Mulching
Applying a layer of organic mulch, such as wood chips or shredded bark, around the base of japanese maple can help retain soil moisture and regulate soil temperature, reducing the need for frequent watering.
Checking Soil Moisture
To assess japanese maple's soil moisture beyond the surface level, insert a small trowel or your finger about 2 inches into the soil. If it feels dry at this depth, it's time to water.
Planting in Well-Draining Soil
Ensure japanese maple is planted in well-draining soil that doesn't hold excessive water. Poorly draining soil can lead to root rot, so amending the soil with organic matter can improve drainage.
Watering Frequency
While watering frequency may vary depending on environmental conditions, japanese maple generally prefers its soil to dry out slightly between watering sessions. Water deeply, allowing water to reach the plant's root zone.
Avoiding Over-Watering
Over-watering can lead to waterlogged soil and root rot in japanese maple. Monitor the soil moisture levels and only water when necessary, ensuring the soil has good drainage and doesn't stay constantly soggy.
Signs of Thirst
When japanese maple is in need of water, the leaves may wilt, and their color may appear dull. Additionally, the soil around the plant may feel completely dry.
Signs of Over-Watering
If the leaves of japanese maple are yellowing or developing brown spots, it may indicate over-watering. Excessive moisture in the soil can also lead to root rot and a foul odor.
Watering during Heatwaves
During heatwaves, japanese maple may require more frequent watering to prevent dehydration. Monitor the soil moisture closely and adjust the watering schedule accordingly.
Watering during Extended Rain
During prolonged rainy periods, japanese maple may not require additional watering as the soil could already be saturated. Assess the soil moisture level before watering to prevent over-watering.
Watering when Stressed
When japanese maple is stressed, such as after transplanting or during periods of extreme weather, provide consistent and adequate water to help it recover and regain vigor.
Considering Hydroponics? How to Manage a Water-Grown Japanese Maple?
Overview of Hydroponics
Hydroponics is a method of growing plants without soil, using a water-based nutrient solution to provide the necessary nutrients. This technique offers precise control over the plant's growing conditions and can result in faster growth and higher yields.
Best Hydroponic System for japanese maple
The nutrient film technique (NFT) system is well-suited for growing japanese maple hydroponically. In this system, a thin film of nutrient solution flows over the roots, providing both water and nutrients. The NFT system allows for effective oxygenation of the roots and prevents waterlogging, which makes it ideal for japanese maple's needs.
Nutrient Solution Requirements
Japanese maple thrives in a balanced nutrient solution with the following concentrations (in parts per million - ppm): Nitrogen (N) - 100-150 ppm, Phosphorus (P) - 50-75 ppm, Potassium (K) - 150-200 ppm. The pH of the nutrient solution should be maintained between 5.8-6.2. It is essential to regularly monitor and adjust the nutrient solution to ensure optimal growth.
Challenges in Hydroponic Cultivation of japanese maple
Root rot is a common issue faced when growing japanese maple hydroponically. To prevent this, it is crucial to maintain proper oxygenation of the roots and avoid over-watering. Nutrient imbalances can also occur, leading to stunted growth or nutrient deficiencies. Regular monitoring of the nutrient solution and adjusting concentrations accordingly can help prevent these challenges. Japanese maple requires a moderate amount of light, so providing sufficient artificial lighting can be a challenge in some setups.
Monitoring japanese maple's Health in Hydroponics
In a hydroponic setup, japanese maple's leaves can indicate its overall health. Yellowing or wilting leaves may indicate nutrient deficiencies or imbalances. Leaf browning or burned edges can be a sign of excessive nutrient concentrations or light intensity. Checking the roots for any signs of rot or discoloration is also important. Regular monitoring of the nutrient solution's pH and EC (electrical conductivity) levels is essential to ensure optimal nutrient uptake.
Adjusting Hydroponic Environment for japanese maple
As japanese maple progresses through different growth stages, adjustments to the hydroponic environment may be necessary. During the vegetative stage, provide a nutrient solution with a slightly higher nitrogen concentration to promote leaf growth. As japanese maple enters the flowering or fruiting stage, adjusting the nutrient solution to have a slightly higher phosphorus and potassium concentration can support flowering and fruit development. Light duration can also be adjusted to mimic seasonal changes.
Nutrient Solution
Japanese maple prefers a balanced nutrient solution with a pH of 5.8-6.2 for optimal growth.
Hydroponic System
The nutrient film technique (NFT) system is ideal for growing japanese maple hydroponically.
Challenges
Root rot, nutrient imbalances, and light requirements are common challenges when growing japanese maple hydroponically.
Monitoring japanese maple's Health
Regularly check the leaves for signs of wilting, yellowing, browning, or burning. Monitor the roots for any signs of rot or discoloration. Maintain pH and EC levels in the nutrient solution.
Adjusting Hydroponic Environment
Adjust nutrient concentrations based on the growth stage. Adjust light duration to mimic seasonal changes.
Important Symptoms
Overwatering Symptoms of Japanese maple
Japanese maple is more susceptible to developing disease symptoms when overwatered because it prefers a soil environment with moderate humidity. Symptoms of overwatering include yellowing leaves, root rot, leaf drop...
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Yellowing leaves
When plants receive too much water, the roots become oxygen deprived and the bottom leaves of the plant gradually turn yellow.
Root rot
Excess water in the soil can lead to the growth of harmful fungi and bacteria, causing the roots to rot and eventually kill the plant.
Leaf drop
When plants are overwatered, they may shed their leaves as a response to stress, even if the leaves appear green and healthy.
Mold and mildew
Overwatered plants create a damp environment that can encourage the growth of mold and mildew on soil.
Increased susceptibility diseases
Overwatering plants may become more susceptible and diseases as their overall health declines, weakening their natural defenses.
Solutions
1. Adjust watering frequency based on seasons and soil dryness. Wait for soil to dry before watering.2. Increase soil aeration by loosening surface and gently stirring with a wooden stick or chopstick.3. Optimize environment with good ventilation and warmth to enhance water evaporation and prevent overwatering.
Underwatering Symptoms of Japanese maple
Japanese maple is more susceptible to plant health issues when lacking watering, as it can only tolerate short periods of drought. Symptoms of dehydration include wilting, yellowing leaves, leaf drop...
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(Symptom details and solutions)
Wilting
Due to the dry soil and insufficient water absorption by the roots, the leaves of the plant will appear limp, droopy, and lose vitality.
Root damage
Prolonged underwatering can cause root damage, making it difficult for the plant to absorb water even when it is available.
Dry stems
Due to insufficient water, plant stems may become dry or brittle, making the branches easy to break.
Dying plant
If underwatering continues for an extended period, the plant may ultimately die as a result of severe water stress and an inability to carry out essential functions.
Solutions
1. Thoroughly saturate soil with slow ring watering to ensure uniform and sufficient moisture for plants. 2. Increase air humidity with water trays or misting to slow leaf water evaporation. 3. Watering according to the recommended frequency.Adjust watering frequency based on seasons and soil dryness.
Watering Troubleshooting for Japanese Maple
Why are the leaves of my japanese maple turning brown?
Often, brown leaves indicate overwatering. Japanese maple prefers well-drained soil. If the soil is compacted or holds too much moisture, the plant could be suffering from root rot. Modify your watering schedule and improve the soil's drainage by adding in coarse sand or gravel.
Why are the edges of my japanese maple leaves turning crispy and curling up?
This could mean that your japanese maple is under watered, or it's receiving too much sun. Ensure that your soil is consistently moist but not waterlogged, and if necessary, move your plant to a location where it gets partial shade.
Why is my japanese maple losing leaves despite adequate watering?
Although watering could be adequate, the water may not be soaking deep enough into the soil. For japanese maple, deep watering is critical to encourage the development of a robust root system. Try watering your japanese maple deeply and less frequently.
The leaves of my japanese maple are yellowing. What's causing this?
Yellowing leaves may be a sign that your japanese maple is being overwatered. This plant prefers a consistently damp, but not water-logged soil. Adjust your watering practices to ensure soil is not remaining soggy for extended periods.
Why does the foliage of my japanese maple look burnt even though it’s well-watered?
If your japanese maple is well-watered but the foliage appears burnt, the issue may be with water quality. This plant is sensitive to chemicals such as chlorine or minerals in hard water. Try using rainwater or filtered water for irrigation.
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Lighting
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Requirements
Partial sun
Ideal
About 3-6 hours sunlight
Full shade, Full sun
Tolerance
Less than 3 hours of sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
Japanese maple's sunlight needs are flexible; it can tolerate both areas bathed in light and areas that receive filtered light throughout the day. This adaptability originates from its home environment, with diverse light conditions. Insufficient lighting may reduce leaf coloration, while excessive can cause leaf scorch.
Preferred
Tolerable
Unsuitable
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
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Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Japanese maple is a versatile plant that thrives in full sunlight but can tolerate partial shade. While it can adapt to different light conditions, when grown indoors with insufficient light, subtle symptoms of light deficiency may arise.
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Slower or no new growth
Japanese maple enters a survival mode when light conditions are poor, which leads to a halt in leaf production. As a result, the plant's growth becomes delayed or stops altogether.
Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Leggy or sparse growth
The spaces between leaves or stems of your japanese maple may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Solutions
1. To optimize plant growth, shift them to increasingly sunnier spots each week until they receive 3-6 hours of direct sunlight daily, enabling gradual adaptation to changing light conditions.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Japanese maple thrives in full sun exposure but can adapt to partial shade. Although sunburn symptoms occur occasionally, they are generally tolerant of different light conditions due to their resilience.
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Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
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Temperature
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Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
Japanese maple grows best in a temperate climate with a preferred temperature range of 32 to 95 ℉ (0 to 35 ℃). It is native to Japan where the temperature ranges from 23 to 81 ℉ (-5 to 27 ℃). During the hot summer months, it is recommended to provide shade and ample water to help the plant adjust to the high temperatures. In colder conditions, it is best to protect the roots with mulch and provide wind barriers to prevent cold damage.
Regional wintering strategies
Japanese maple has strong cold resistance, so special frost protection measures are usually not necessary during winter. However, if the winter temperatures are expected to drop below {Limit_growth_temperature}, it is still important to provide cold protection. This can be achieved by wrapping the trunk and branches with materials such as non-woven fabric or cloth. Before the first freeze in autumn, it is recommended to water the plant abundantly, ensuring the soil remains moist and enters a frozen state. This helps prevent drought and water scarcity for the plant during winter and early spring.
Important Symptoms
Symptoms of Low Temperature in Japanese maple
Japanese maple is cold-tolerant and thrives best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, although there may not be any noticeable changes during winter, the branches may become brittle and dry during springtime, and no new shoots will emerge.
Solutions
In spring, prune away any dead branches that have failed to produce new leaves.
Symptoms of High Temperature in Japanese maple
During summer, Japanese maple should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the leaves of the plant may become lighter in color, the tips may become dry and withered, and the plant becomes more susceptible to sunburn.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun, or use a shade cloth to create shade. Water the plant in the morning and evening to keep the soil moist.
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_ga Google Analytics These cookies are set because of our use of Google Analytics. They are used to collect information about your use of our application/website. The cookies collect specific information, such as your IP address, data related to your device and other information about your use of the application/website. Please note that the data processing is essentially carried out by Google LLC and Google may use your data collected by the cookies for own purposes, e.g. profiling and will combine it with other data such as your Google Account. For more information about how Google processes your data and Google’s approach to privacy as well as implemented safeguards for your data, please see here. 1 Year
_pta PictureThis Analytics We use these cookies to collect information about how you use our site, monitor site performance, and improve our site performance, our services, and your experience. 1 Year
Cookie Name
_ga
Source
Google Analytics
Purpose
These cookies are set because of our use of Google Analytics. They are used to collect information about your use of our application/website. The cookies collect specific information, such as your IP address, data related to your device and other information about your use of the application/website. Please note that the data processing is essentially carried out by Google LLC and Google may use your data collected by the cookies for own purposes, e.g. profiling and will combine it with other data such as your Google Account. For more information about how Google processes your data and Google’s approach to privacy as well as implemented safeguards for your data, please see here.
Lifespan
1 Year

Cookie Name
_pta
Source
PictureThis Analytics
Purpose
We use these cookies to collect information about how you use our site, monitor site performance, and improve our site performance, our services, and your experience.
Lifespan
1 Year
Marketing Cookies
Marketing cookies are used by advertising companies to serve ads that are relevant to your interests.
Cookie Name Source Purpose Lifespan
_fbp Facebook Pixel A conversion pixel tracking that we use for retargeting campaigns. Learn more here. 1 Year
_adj Adjust This cookie provides mobile analytics and attribution services that enable us to measure and analyze the effectiveness of marketing campaigns, certain events and actions within the Application. Learn more here. 1 Year
Cookie Name
_fbp
Source
Facebook Pixel
Purpose
A conversion pixel tracking that we use for retargeting campaigns. Learn more here.
Lifespan
1 Year

Cookie Name
_adj
Source
Adjust
Purpose
This cookie provides mobile analytics and attribution services that enable us to measure and analyze the effectiveness of marketing campaigns, certain events and actions within the Application. Learn more here.
Lifespan
1 Year
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