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How to care Golden Full-moon Maple 'moonrise'
Golden full-moon maple 'Moonrise' is a spectacularly colored cultivar in the Maple family. In spring, its fingered leaves are a bright red color, then they change to an almost Day-glo lime green in summer before taking on dramatic red and rustic colors in fall. This cultivar was developed by Carl Munn and won the 2016 Maple of the year award from the American Maple Society.
Sunlight
Full sun
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Basic Care Guide
Water
The golden full-moon maple 'Moonrise' prefers the soil to be kept moist, especially during the summer, because dry weather can cause its leaves to scorch and even fall off in severe cases. During the summer, in addition to watering the roots, foliage can be sprayed during the evening to increase the humidity.
- In the summer, seedlings growing in pots may need watering twice a day, in the morning and the evening.
- In the spring and fall, watering should be carried out depending on the actual conditions. Watering can be reduced slightly as the temperature drops in the fall, which will help the leaves to change color.
- In the winter, it is only necessary to ensure that the soil does not dry out.
Attention should be paid to the watering of seedlings grown in gardens during the early stages. At later stages, water should be supplied according to the weather, that is if there is no rain for more than two weeks in the summer.
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Fertilizer
Potted seedlings should be given slow-release fertilizer only. For seedlings grown in gardens, fertilizer should be applied three times a year: once in the early spring, once in early summer for the growth period, and once in the fall.
Sunlight
The golden full-moon maple 'Moonrise' has a certain requirement for sunlight and prefers a partially shaded area. In cases of exposure to direct sunlight in the summer, the leaves of most varieties will wither, so shading is required. As the plants get older and their root system grows, this condition will be less of a problem. A few varieties will tolerate exposure to direct sunlight, such as ‘Beni Maiko’ and ‘De Shojo’. Some weeping varieties can also tolerate exposure to direct sunlight, such as ‘Ao Shidare’.
Sunlight conditions will directly affect the ornamental appearance of golden full-moon maple 'Moonrise' leaves. In the spring, sufficient sunlight will make the maple leaves more vivid, while in cases of insufficient sunlight or partial shading the leaf color may fade. During the fall, sunlight can also affect the leaf color. For potted plants, full exposure to sunlight is recommended during the spring and the fall, with partial shading in the summer.
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Pruning
Pruning is mainly used to enhance internal ventilation, improve shoot formation, promote growth, and for shaping. The common approach to pruning is to remove any old or weak branches, remove any branches that disrupt the shape of the tree, and remove any branches that cross other branches. Pruning is used to control the plant according to the required height and shape. Generally, this follows the "Y-type" pruning method.
It is possible to prune a golden full-moon maple 'Moonrise' throughout the year, but the coldest winter months should be avoided to prevent damage to the plant. Major pruning to shape a maple can be performed following defoliation in the fall, or prior to leaf growth in the spring. It is recommended to prune in the fall because withered and full buds can be easily distinguished.
According to the shaping plan, you can prune any withered buds and keep the full ones, thus making your tree healthier. For pruning in the summer, diseased, weak, or dead branches can be removed, mainly to enhance the tree's ventilation.
If grown as a potted plant, the roots can easily occupy the entire flowerpot due to the limited space. this can make a golden full-moon maple 'Moonrise' prone to aging if an old flowerpot is not changed. It is recommended that old roots are pruned during the dormancy period, that is, cut off any old, coarse, diseased, and weak roots.
Advanced Care Guide
Temperature
The golden full-moon maple 'Moonrise' has good cold resistance and is able to tolerate low temperatures. The golden full-moon maple 'Moonrise' is native to the margins of forests in China, Japan, and North Korea, so these trees generally prefer a humid environment. Most golden full-moon maple 'Moonrise' plants have shallow root systems, so they should be watered frequently during the summer. For some varieties, a sprayed mist should be provided during the summer to increase the humidity of the air around them.
Soil
The golden full-moon maple 'Moonrise' does not have many specific requirements for soil. It is a forest native, so it prefers well-drained soil that is rich in humus and slightly acidic. Its main root will extend deep into the soil, but its tiny fibrous roots will be concentrated near the soil surface, so accumulated water in the soil tends to cause root rot.
Propagation
Planting
Common propagation methods include grafting, taking cuttings, and sowing seeds.
Grafting is the most common propagation method. Seedlings of Acer palmatum or Acer oliverianum are usually selected for the rootstock. Grafted seedlings have strong roots and grow rapidly, but poor affinity is occasionally present in some cases. Seedlings with Acer oliverianum as the rootstock are less hardy.
Cuttings take longer to grow and are mostly used in the production of bonsai.
Sowing seeds is a common way to cultivate new varieties. The hybrid offspring of two different maples are sown and valuable individuals are then selected from the seedlings. The traits of the parents may not be maintained in the selected offspring.
The best time for planting or transplanting a golden full-moon maple 'Moonrise' is following defoliation in the fall. At this time, the leaves will have fallen off so there is little transpiration and water loss can be avoided. In addition, the root system will still be growing at this time, preparing for regrowth the following spring. Transplanting should be avoided on the coldest days because cold wind can kill some of the shoots and branches. During the winter, in areas that cannot be sheltered from the wind, it is recommended to cover the branches.
Seasonal Precautions
Ensure the plant is frequently watered during the summer, because if it dries out its leaves may wither and the plant may even lose all of its leaves. For some varieties, it is recommended that seedlings are shaded in the summer. In the winter, plants grown in cold regions of the north should have any new branches protected so as to avoid them being damaged by cold winds.
Common Pests & Diseases
Common issues for Golden full-moon maple 'Moonrise' based on 10 million real cases
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
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
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.
Underwatering
A lack of water will cause the leaves to gradually turn yellow starting at the base of the branch while the entire plant appears to wilt.
Solutions: Your plant is very thirsty and needs water promptly. You can revive your plant by giving it water. The easiest technique is to slowly pour water into your plant’s soil so that the whole surface is moistened. If you pour the water too quickly, the water will flow directly through rather than diffusing throughout the soil. If your plant’s pot does not have drainage holes, do not give your plant more than about a third of the pot’s volume of water. If your plant’s pot does have drainage holes, you can add water slowly until the soil is thoroughly moistened and the water flows freely through the pot. If you trim off yellow leaves to improve the plant’s appearance, do not remove more than a third of the plant’s leaves. It may be better to wait until leaves have died and fallen off to remove them.
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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
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
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.
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.
- Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
- Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
- 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
Fungal infection or normal ripening can cause the fruit to dry out.
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
Here are the most common symptoms in the order that they are likely to occur.
- Both leaves and blossom on the tips of branches will go brown and wither.
- Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
- Any fruit that does appear will turn wrinkled and fail to develop.
- Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
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
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.
Prevention
Preventative measures include:
- Ensuring adequate spacing between plants or trees.
- Staking plants that are prone to tumbling to prevent moisture or humidity build up.
- Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
- Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
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
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
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
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
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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Underwatering
A lack of water will cause the leaves to gradually turn yellow starting at the base of the branch while the entire plant appears to wilt.
Symptom Analysis
Your plant’s leaves are turning yellow due to underwatering, the oldest leaves turn yellow first. Leaves yellow from the edges towards the middle. Other signs of underwatering include the soil feeling very dry or pulling away from the edge of its pot.
Solutions
Your plant is very thirsty and needs water promptly.
- You can revive your plant by giving it water. The easiest technique is to slowly pour water into your plant’s soil so that the whole surface is moistened. If you pour the water too quickly, the water will flow directly through rather than diffusing throughout the soil. If your plant’s pot does not have drainage holes, do not give your plant more than about a third of the pot’s volume of water. If your plant’s pot does have drainage holes, you can add water slowly until the soil is thoroughly moistened and the water flows freely through the pot.
- If you trim off yellow leaves to improve the plant’s appearance, do not remove more than a third of the plant’s leaves. It may be better to wait until leaves have died and fallen off to remove them.
Prevention
- When you get a new plant, research its specific watering needs. Set reminders so that you remember to water your plants consistently. Not all plants are the same, so make sure to differentiate all of your plants in your watering schedule.
- You may wish to purchase a commercial soil water meter which has a long probe that you place near your plant’s roots. Be sure to check it frequently and water your plant when the soil water meter indicates that it needs watering.
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More About Golden Full-moon Maple 'moonrise'
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Common Problems
Why does my golden full-moon maple 'Moonrise' not change color?
The change in leaf color is the result of a combination of factors. Generally speaking, leaf color is affected by temperature, sunlight, humidity, and vigor. A good color effect can only be obtained with appropriate changes in temperature, a certain amount of sunlight, and a certain degree of humidity. If there is a sharp drop in temperature, the leaves will simply fall off. The color will fade if there is insufficient sunlight. If there is inadequate humidity, the color will not be bright enough to provide a good display.
Why do the branches look short and stunted?
this is generally due to poor root growth. The plant takes in insufficient nutrients to grow healthy new branches, so any new branches are short, meaning that an elegant shape cannot be obtained. The roots of newly transplanted golden full-moon maple 'Moonrise' trees generally do not recover, but this situation can be improved by the second year if the golden full-moon maple 'Moonrise' is well cared for.
Why should the leaves be removed in the fall?
In some regions, the leaves can suffer from leaf burn and margin scorch if exposed to too much strong sunlight during the summer. If no protective measures are taken at this time, the leaf color in the fall will be very poor and the leaves may even fall off in advance, spoiling the ornamental effect. If a maple has severely scorched leaves, some of these leaves may be removed during August and September. It is not recommended to remove leaves from less vigorous golden full-moon maple 'Moonrise' varieties, such as Acer shirasawanum aureum.
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About
Basic Care
Advanced Care
Pests & Diseases
More Info
FAQ
How to care Golden Full-moon Maple 'moonrise'
Golden full-moon maple 'Moonrise' is a spectacularly colored cultivar in the Maple family. In spring, its fingered leaves are a bright red color, then they change to an almost Day-glo lime green in summer before taking on dramatic red and rustic colors in fall. This cultivar was developed by Carl Munn and won the 2016 Maple of the year award from the American Maple Society.
Sunlight
Full sun
Basic Care Guide
Water
The golden full-moon maple 'Moonrise' prefers the soil to be kept moist, especially during the summer, because dry weather can cause its leaves to scorch and even fall off in severe cases. During the summer, in addition to watering the roots, foliage can be sprayed during the evening to increase the humidity.
- In the summer, seedlings growing in pots may need watering twice a day, in the morning and the evening.
- In the spring and fall, watering should be carried out depending on the actual conditions. Watering can be reduced slightly as the temperature drops in the fall, which will help the leaves to change color.
- In the winter, it is only necessary to ensure that the soil does not dry out.
Attention should be paid to the watering of seedlings grown in gardens during the early stages. At later stages, water should be supplied according to the weather, that is if there is no rain for more than two weeks in the summer.
Never miss a care task again!
Plant care made easier than ever with our tailor-made smart care reminder.
Fertilizer
Potted seedlings should be given slow-release fertilizer only. For seedlings grown in gardens, fertilizer should be applied three times a year: once in the early spring, once in early summer for the growth period, and once in the fall.
Sunlight
The golden full-moon maple 'Moonrise' has a certain requirement for sunlight and prefers a partially shaded area. In cases of exposure to direct sunlight in the summer, the leaves of most varieties will wither, so shading is required. As the plants get older and their root system grows, this condition will be less of a problem. A few varieties will tolerate exposure to direct sunlight, such as ‘Beni Maiko’ and ‘De Shojo’. Some weeping varieties can also tolerate exposure to direct sunlight, such as ‘Ao Shidare’.
Sunlight conditions will directly affect the ornamental appearance of golden full-moon maple 'Moonrise' leaves. In the spring, sufficient sunlight will make the maple leaves more vivid, while in cases of insufficient sunlight or partial shading the leaf color may fade. During the fall, sunlight can also affect the leaf color. For potted plants, full exposure to sunlight is recommended during the spring and the fall, with partial shading in the summer.
Know the light your plants really get.
Find the best spots for them to optimize their health, simply using your phone.
Pruning
Pruning is mainly used to enhance internal ventilation, improve shoot formation, promote growth, and for shaping. The common approach to pruning is to remove any old or weak branches, remove any branches that disrupt the shape of the tree, and remove any branches that cross other branches. Pruning is used to control the plant according to the required height and shape. Generally, this follows the "Y-type" pruning method.
It is possible to prune a golden full-moon maple 'Moonrise' throughout the year, but the coldest winter months should be avoided to prevent damage to the plant. Major pruning to shape a maple can be performed following defoliation in the fall, or prior to leaf growth in the spring. It is recommended to prune in the fall because withered and full buds can be easily distinguished.
According to the shaping plan, you can prune any withered buds and keep the full ones, thus making your tree healthier. For pruning in the summer, diseased, weak, or dead branches can be removed, mainly to enhance the tree's ventilation.
If grown as a potted plant, the roots can easily occupy the entire flowerpot due to the limited space. this can make a golden full-moon maple 'Moonrise' prone to aging if an old flowerpot is not changed. It is recommended that old roots are pruned during the dormancy period, that is, cut off any old, coarse, diseased, and weak roots.
Advanced Care Guide
Temperature
The golden full-moon maple 'Moonrise' has good cold resistance and is able to tolerate low temperatures. The golden full-moon maple 'Moonrise' is native to the margins of forests in China, Japan, and North Korea, so these trees generally prefer a humid environment. Most golden full-moon maple 'Moonrise' plants have shallow root systems, so they should be watered frequently during the summer. For some varieties, a sprayed mist should be provided during the summer to increase the humidity of the air around them.
Soil
The golden full-moon maple 'Moonrise' does not have many specific requirements for soil. It is a forest native, so it prefers well-drained soil that is rich in humus and slightly acidic. Its main root will extend deep into the soil, but its tiny fibrous roots will be concentrated near the soil surface, so accumulated water in the soil tends to cause root rot.
Propagation
Planting
Common propagation methods include grafting, taking cuttings, and sowing seeds.
Grafting is the most common propagation method. Seedlings of Acer palmatum or Acer oliverianum are usually selected for the rootstock. Grafted seedlings have strong roots and grow rapidly, but poor affinity is occasionally present in some cases. Seedlings with Acer oliverianum as the rootstock are less hardy.
Cuttings take longer to grow and are mostly used in the production of bonsai.
Sowing seeds is a common way to cultivate new varieties. The hybrid offspring of two different maples are sown and valuable individuals are then selected from the seedlings. The traits of the parents may not be maintained in the selected offspring.
The best time for planting or transplanting a golden full-moon maple 'Moonrise' is following defoliation in the fall. At this time, the leaves will have fallen off so there is little transpiration and water loss can be avoided. In addition, the root system will still be growing at this time, preparing for regrowth the following spring. Transplanting should be avoided on the coldest days because cold wind can kill some of the shoots and branches. During the winter, in areas that cannot be sheltered from the wind, it is recommended to cover the branches.
Seasonal Precautions
Ensure the plant is frequently watered during the summer, because if it dries out its leaves may wither and the plant may even lose all of its leaves. For some varieties, it is recommended that seedlings are shaded in the summer. In the winter, plants grown in cold regions of the north should have any new branches protected so as to avoid them being damaged by cold winds.
Common Pests & Diseases
Common issues for Golden full-moon maple 'Moonrise' based on 10 million real cases
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 ![more]()
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 ![more]()
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 ![more]()
Underwatering
A lack of water will cause the leaves to gradually turn yellow starting at the base of the branch while the entire plant appears to wilt.
Solutions: Your plant is very thirsty and needs water promptly. You can revive your plant by giving it water. The easiest technique is to slowly pour water into your plant’s soil so that the whole surface is moistened. If you pour the water too quickly, the water will flow directly through rather than diffusing throughout the soil. If your plant’s pot does not have drainage holes, do not give your plant more than about a third of the pot’s volume of water. If your plant’s pot does have drainage holes, you can add water slowly until the soil is thoroughly moistened and the water flows freely through the pot. If you trim off yellow leaves to improve the plant’s appearance, do not remove more than a third of the plant’s leaves. It may be better to wait until leaves have died and fallen off to remove them.
Learn More ![more]()
Treat and prevent plant diseases.
AI-powered plant doctor helps you diagnose plant problems in seconds.
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
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
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.
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.
- Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
- Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
- 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
Fungal infection or normal ripening can cause the fruit to dry out.
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
Here are the most common symptoms in the order that they are likely to occur.
- Both leaves and blossom on the tips of branches will go brown and wither.
- Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
- Any fruit that does appear will turn wrinkled and fail to develop.
- Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
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
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.
Prevention
Preventative measures include:
- Ensuring adequate spacing between plants or trees.
- Staking plants that are prone to tumbling to prevent moisture or humidity build up.
- Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
- Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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Black spot
Infection by the black spot pathogen causes black spots or patches to appear on leaves.
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
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
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
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
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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Underwatering
A lack of water will cause the leaves to gradually turn yellow starting at the base of the branch while the entire plant appears to wilt.
Symptom Analysis
Your plant’s leaves are turning yellow due to underwatering, the oldest leaves turn yellow first. Leaves yellow from the edges towards the middle. Other signs of underwatering include the soil feeling very dry or pulling away from the edge of its pot.
Solutions
Your plant is very thirsty and needs water promptly.
- You can revive your plant by giving it water. The easiest technique is to slowly pour water into your plant’s soil so that the whole surface is moistened. If you pour the water too quickly, the water will flow directly through rather than diffusing throughout the soil. If your plant’s pot does not have drainage holes, do not give your plant more than about a third of the pot’s volume of water. If your plant’s pot does have drainage holes, you can add water slowly until the soil is thoroughly moistened and the water flows freely through the pot.
- If you trim off yellow leaves to improve the plant’s appearance, do not remove more than a third of the plant’s leaves. It may be better to wait until leaves have died and fallen off to remove them.
Prevention
- When you get a new plant, research its specific watering needs. Set reminders so that you remember to water your plants consistently. Not all plants are the same, so make sure to differentiate all of your plants in your watering schedule.
- You may wish to purchase a commercial soil water meter which has a long probe that you place near your plant’s roots. Be sure to check it frequently and water your plant when the soil water meter indicates that it needs watering.
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More About Golden Full-moon Maple 'moonrise'
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Common Problems
Why does my golden full-moon maple 'Moonrise' not change color?
The change in leaf color is the result of a combination of factors. Generally speaking, leaf color is affected by temperature, sunlight, humidity, and vigor. A good color effect can only be obtained with appropriate changes in temperature, a certain amount of sunlight, and a certain degree of humidity. If there is a sharp drop in temperature, the leaves will simply fall off. The color will fade if there is insufficient sunlight. If there is inadequate humidity, the color will not be bright enough to provide a good display.
Why do the branches look short and stunted?
this is generally due to poor root growth. The plant takes in insufficient nutrients to grow healthy new branches, so any new branches are short, meaning that an elegant shape cannot be obtained. The roots of newly transplanted golden full-moon maple 'Moonrise' trees generally do not recover, but this situation can be improved by the second year if the golden full-moon maple 'Moonrise' is well cared for.
Why should the leaves be removed in the fall?
In some regions, the leaves can suffer from leaf burn and margin scorch if exposed to too much strong sunlight during the summer. If no protective measures are taken at this time, the leaf color in the fall will be very poor and the leaves may even fall off in advance, spoiling the ornamental effect. If a maple has severely scorched leaves, some of these leaves may be removed during August and September. It is not recommended to remove leaves from less vigorous golden full-moon maple 'Moonrise' varieties, such as Acer shirasawanum aureum.
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