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Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Eurybia macrophylla
Also known as : Large-leaved wood aster, Large-leaf Wood-aster, Bigleaf wood aster
Hardiness Zones
Hardiness Zones
4 to 8
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care guide

Care Guide for Large-leaved aster

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Watering Care
Watering Care
Details on Watering Care Watering Care
Soil Care
Soil Care
Sand, Loam, Chalky, Clay, Acidic
Details on Soil Care Soil Care
Ideal Lighting
Ideal Lighting
Partial sun, Full shade, Full sun
Details on Sunlight Requirements Ideal Lighting
Ideal Temperature
Ideal Temperature
4 to 8
Details on Temperature Ideal Temperature
Planting Time
Planting Time
Fall, Late spring
Details on Planting Time Planting Time
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Large-leaved aster
Water
Water
Every week
Hardiness Zones
Hardiness Zones
4 to 8
Planting Time
Planting Time
Fall, Late spring
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Questions About Large-leaved aster

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What is the best way to water my Large-leaved aster?
When watering the Large-leaved aster, you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the Large-leaved aster comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
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What should I do if I water my Large-leaved aster too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Large-leaved aster, but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the Large-leaved aster, as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your Large-leaved aster have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Large-leaved aster. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your Large-leaved aster grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your Large-leaved aster is receiving too little water, all you need to do is water more regularly until those signs have subsided.
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How often should I water my Large-leaved aster?
If your plant is in a pot. The most precise way to decide whether your Large-leaved aster needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water. If you grow your Large-leaved aster outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Large-leaved aster can show an admirable ability to withstand drought.
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How much water does my Large-leaved aster need?
When it comes time to water your Large-leaved aster, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
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How should I water my Large-leaved aster at different growth stages?
The water needs of the Large-leaved aster can change depending on growth stages as well. For example, when your Large-leaved aster is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your Large-leaved aster will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your Large-leaved aster will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your Large-leaved aster more water at this time.
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How should I water my Large-leaved aster through the seasons?
The Large-leaved aster will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your Large-leaved aster will contract a disease.
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What's the difference between watering my Large-leaved aster indoors and outdoors?
It is most common to grow the Large-leaved aster indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your Large-leaved aster to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your Large-leaved aster very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.
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Key Facts About Large-leaved aster

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Attributes of Large-leaved aster

Lifespan
Perennial
Plant Type
Herb
Planting Time
Fall, Late spring
Bloom Time
Summer, Fall
Harvest Time
Fall
Plant Height
15 cm to 91 cm
Spread
30 cm
Leaf Color
Green
Flower Size
2.5 cm
Flower Color
White
Purple
Yellow
Blue
Fruit Color
Brown
Yellow
Orange
Stem Color
Purple
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
5 - 32 ℃
Pollinators
Beetles, Wasps, Flies, Butterflies
Benefits to Pollinating Insects
Adult food, Larval food
Growth Rate:Moderate
Over the course of Spring, Summer, and Fall, large-leaved aster cultivates a moderate growth rate. This pace ensures consistent development, enhancing foliage density and size with the advent of each season. Fluctuations in growth occur seasonally, with Spring denoting a surge while Fall tapering is visible. This rhythm in growth rate uniquely culminates in large-leaved aster's sturdy yet distinctly expansive morphology.

Symbolism

Usages

Garden Use

Scientific Classification of Large-leaved aster

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Quickly Identify Large-leaved aster

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1
Large heart-shaped leaves up to 8 inches (20 cm) across.
2
Clusters of lavender or bluish flowers with yellow centers, 1-1.5 inches (2.5-4 cm) in diameter.
3
Sturdy stems with a slightly hairy texture.
4
Daisy-like star-shaped flowers, 1-2 inches (2.5-5 cm) wide, with yellow disc florets.
5
Dry indehiscent seeds (achenes) with fluffy pappus, 0.08-0.12 inches (2-3 mm) in size.
Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image
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Common Pests & Diseases About Large-leaved aster

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Common issues for Large-leaved aster based on 10 million real cases
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Brown blotch
Brown spot is a disease that affects Large-leaved aster by causing lesions on the leaves that can lead to a decline in the plant's health. It is caused by various factors and can be managed through proper practices and treatments.
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.
Aged yellow and dry
Aged yellow and dry Aged yellow and dry
Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Solutions: If the yellowing and drying of leaves and flowers is a natural progression due to age, nothing can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
Leaf deformity
Leaf deformity Leaf deformity
Leaf deformity
Leaf deformities can have a variety of causes.
Solutions: Follow these steps to revive plants with abnormal leaves. Remove damaged leaves: Plants can recover from damage when given the time to do so. Remove any deformed leaves so they don't continue drawing energy from the plant. This also creates room for healthier ones to grow. Stop using herbicide: Though herbicide damage is challenging to diagnose, gardeners can potentially prevent deformed leaves by not using any and by strictly following manufacturers instructions. Spray insecticide: Prevent pests from inhabiting plant leaves by spraying with insecticide regularly and practicing good natural pest prevention techniques. Apply a balanced fertilizer: Solve nutrient deficiencies and excesses by using a well-balanced fertilizer (organic or conventional both work) before planting, and consider topdressing when signs of stress are apparent. Fix watering schedule: If plant leaves are curled downward due to too much or too little water, adjust the watering schedule so the soil is moist, but not damp. Remove infected plants: If the plant has succumbed to a viral infection, not much can be done to revive it. Remove and destroy all compromised plant material to prevent spread to other plants.
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Brown blotch
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Brown blotch Disease on Large-leaved aster?
What is Brown blotch Disease on Large-leaved aster?
Brown spot is a disease that affects Large-leaved aster by causing lesions on the leaves that can lead to a decline in the plant's health. It is caused by various factors and can be managed through proper practices and treatments.
Symptom Analysis
Symptom Analysis
The main symptoms on Large-leaved aster are the development of small, circular brown spots on the leaves, which may coalesce into larger blotches. The leaves often yellow and wither as the disease progresses.
What Causes Brown blotch Disease on Large-leaved aster?
What Causes Brown blotch Disease on Large-leaved aster?
1
Fungal pathogen
The primary cause of Brown spot is a type of fungus called Bipolaris oryzae, which thrives in warm, humid conditions.
2
Moist conditions
The disease is more likely to occur in wet environments, where water splashes can spread the spores across the leaves.
How to Treat Brown blotch Disease on Large-leaved aster?
How to Treat Brown blotch Disease on Large-leaved aster?
1
Non pesticide
Sanitation: Remove and destroy infected plant matter to prevent the spread of the disease.

Improve circulation: Allow enough space between plants and prune excess foliage to improve air circulation and reduce leaf dampness.
2
Pesticide
Fungicide application: Apply a suitable fungicide, such as chlorothalonil or mancozeb, according to label instructions.
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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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Aged yellow and dry
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Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Overview
Overview
Regardless of the type of plant or where it is grown, at some point, it will begin to aged yellow and dry. This is a natural, unavoidable process that happens when the plant has completed all of the steps in its life.
Annual plants go through this process at the end of a single growing season. Perennial plants live for multiple years, if not tens or hundreds of years, but will still ultimately exhibit these symptoms.
Symptom Analysis
Symptom Analysis
When plants have progressed through their natural developmental stages and are nearing the end of their lifecycle, they begin showing signs of decline. Leaves will start to yellow and droop, and over time they turn papery brown and dry.
Once completely dry, the leaves begin to fall from the plant until the entire plant has dried out.
Disease Cause
Disease Cause
At the end of its life, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence or natural aging and death. Cell division stops, and the plant begins catabolizing resources to use in other parts of the plant.
As this happens, the tissues begin yellow and drying until the entire plant is desiccated and perishes.
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Leaf deformity
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Leaf deformity
Leaf deformities can have a variety of causes.
Overview
Overview
Leaf deformity manifests in the form of curled, cupped, or distorted leaves, often first seen in the spring. There are a number of different possibilities as to the cause and it will not always be easy to isolate the problem without laboratory analysis. In the majority of cases, however, the gardener should be able to isolate the cause through close examination of the plant and the local conditions.
Symptom Analysis
Symptom Analysis
The plant has developed abnormal leaves. They may look similar to leaf curl, but show other problems such as:
  • stunting
  • abnormal shapes
  • a bumpy texture
  • gaps between leaf sections
  • raised growths on the top surface
Disease Cause
Disease Cause
The causes are widespread and varied and the gardener will need to examine plants carefully as well as consider environmental factors.
Disease due to insect damage: Mites, aphids, and other insects that feast on plant leaves can leave them vulnerable to viral and bacterial disease. Some, like leaf galls and rust, produce distorted leaves. If the gardener sees insects on the plants, it is likely the insect is the culprit. Some mites are too small to see, and laboratory analysis may be required.
Herbicide exposure: Herbicides can stress plant leaves. This may lead to stunted growth and a curling, cupped appearance. Even if the plant owner didn't apply herbicides, herbicide drift and planting in contaminated soils can expose plants to these chemicals. If all plants in an area have deformed leaves, the cause is likely herbicides. Herbicide exposure is also characterized by narrow new leaves.
Less than ideal growing conditions: If plants are exposed to cold temperatures right as their leaves are coming out of the bud, they might become stunted and malformed. If deformed leaves occur right after a cold spell or frost, this is likely the cause. Too much and too little water can also cause deformed leaves. Leaves curling down but not distorting is more likely to be a watering issue than a leaf deformity.
Nutrient deficiencies: A lack of critical nutrients during the growing phase, including boron, calcium, and molybdenum, may lead plant leaves to grow stunted or disfigured. If a nutrient deficiency is to blame, the leaves will also show discoloring.
Fungal infections: a variety of fungal pathogens can distort leaves, as is the case with Peach leaf curl.
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distribution

Distribution of Large-leaved aster

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Habitat of Large-leaved aster

Forests, aspen, pine or open spruce woodlands, thickets, clearings, shaded roadsides
Northern Hemisphere
South Hemisphere

Distribution Map of Large-leaved aster

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Large-leaved Aster Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Lighting
Partial sun
Large-leaved aster appreciates significant yet not overwhelming exposure to the sun, while also having resilience to a broad variety of sun conditions, including full day illumination as well as very low-light areas. Its origin habitat suggests a cool environment, and too much sun exposure might impede its growth, whereas too little might negatively affect its healthy development.
Best Sunlight Practices
Transplant
2-3 feet
The prime time to transplant large-leaved aster is the verdant heart of spring, benefiting from softening soil and mild weather. Choose a shady spot with moist, well-draining soil. Ensure abundant water post-transplant to encourage acclimation.
Transplant Techniques
Temperature
-25 - 35 ℃
The large-leaved aster prefers a native growth environment with cool-temperate climates with temperatures ranging from 5 to 32 ℃ (41 to 90 ℉). In the summer months, it is recommended to provide partial shade and keep the temperature range between 18 to 24 ℃ (64 to 75 ℉). During winter, it's advised to maintain temperatures between 10 to 15 ℃ (50 to 59 ℉) to promote dormancy.
Temp for Healthy Growth
Pruning
Spring, Summer
This perennial with large heart-shaped leaves thrives in partial shade and requires minimal pruning to maintain vigor and aesthetic appeal. The optimal pruning periods for large-leaved aster are spring and summer, post-flowering to encourage bushiness, or to remove spent flowers and foliage damage. Pruning should involve selectively cutting back leggy stems and deadheading to promote new growth. Regular pruning enhances air circulation and reduces disease risk, contributing to the plant's longevity and bloom production.
Pruning techniques
Propagation
Spring, Autumn
Large-leaved aster propagates most effectively through division, ideally during spring or autumn. Despite being relatively simple to propagate, success can be observed through new growth and vigorous root development. This plant requires no additional propagation-related tips.
Propagation Techniques
Brown blotch
Brown spot is a disease that affects Large-leaved aster by causing lesions on the leaves that can lead to a decline in the plant's health. It is caused by various factors and can be managed through proper practices and treatments.
Read More
Flower wilting
Flower wilting is a common disease affecting Large-leaved aster, which leads to drooping and discoloration of leaves and stems, negatively impacting the plant's aesthetic and health.
Read More
Dark spots
Dark spots on Large-leaved aster typically manifest as unsightly discolorations on the leaves, reducing the ornamental value and vigor of the plant. Early identification and treatment can mitigate damage and help sustain the plant's health.
Read More
Flower withering
Flower withering disease severely affects the ‘Large-leaved aster,’ manifesting as drooping and discoloration of flowers, leading to premature flower death and overall vigor depletion in the plant.
Read More
Feng shui direction
North
The large-leaved aster is reasonably harmonious with North-facing directions. Its substantial leaves symbolise a grounding force in Feng Shui, encouraging stability and tranquility. For those seeking a certain balance in their northern quarters, this plant might resonate effectively. However, Feng Shui interpretations tend to vary, making this perspective but one of many.
Fengshui Details
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Plants Related to Large-leaved aster

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Cape jasmine
Cape jasmine
Gardenia jasminoides is an evergreen shrub with unique, glossy evergreen leaves and stunning flowers. The sophisticated, matte white flowers are often used in bouquets. The exceptional beauty of this ornamental plant has made it a popular and highly appreciated plant amongst gardeners and horticulturalists.
Golden pothos
Golden pothos
The golden pothos (Epipremnum aureum) is a popular houseplant that is commonly seen in Australia, Asia, and the West Indies. It goes by many nicknames, including "devil's ivy", because it is so hard to kill and can even grow in low light conditions. Golden pothos has poisonous sap, so it should be kept away from pets and children.
Pepper
Pepper
The pepper are commonly used for cooking in places such as the Southern U.S. and Central America. Most are moderately spicy, though because there are so many variants, the spice level can vary dramatically. Cayenne powder is also a popular seasoning product made from pepper plants.
Swiss cheese plant
Swiss cheese plant
The swiss cheese plant (Monstera deliciosa) produces bright, glossy leaves and makes a popular houseplant. It is originally native to tropical forest regions in Central America. The nickname swiss cheese plant refers to the small holes that develop in the plant's leaves. The long fruits resemble corncobs and smell sweet and fragrant when ripe.
Snake plant
Snake plant
Snake plant can be considered a houseplant and an architectural display due to its sword-like leaves with bold striping patterns, which are distinctive and eye-catching. However, use caution with this plant because it is poisonous when ingested and can cause nausea, vomiting, and even swelling of the throat and tongue.
Bigleaf hydrangea
Bigleaf hydrangea
The bigleaf hydrangea is a deciduous shrub native to Japan, and is known for its lush, oval, colorful inflorescence. The two types of Hydrangea macrophylla are mopheads - with large, ball-shaped, sterile flower clusters, and lace capes - with small round fertile flowers in the center, and sterile flowers on the outer side of each inflorescence. Depending on soil pH, blooms can change color from pink to blue.
Corn plant
Corn plant
Corn plant (Dracaena fragrans) is an evergreen, slow-growing perennial shrub native to tropical Africa. Also, it is a classic houseplant, grown in Europe since the 1800s. Its glossy green foliage that resembles corn leaves grow on top of a thick cane, which is why the plant is sometimes called “false palm tree.”
Peace lily
Peace lily
The peace lily gets its scientific name Spathiphyllum wallisii from a combination of the two Greek words ‘spath’ and ‘phyl’, which means spoon and leaves, respectively. The large graceful white spathe of the peace lily resembles a white flag, which is an international symbol of truce or peace.
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Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Large-leaved aster
Eurybia macrophylla
Also known as: Large-leaved wood aster, Large-leaf Wood-aster, Bigleaf wood aster
Hardiness Zones
Hardiness Zones
4 to 8
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Care Guide for Large-leaved aster

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Questions About Large-leaved aster

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What is the best way to water my Large-leaved aster?
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What should I do if I water my Large-leaved aster too much or too little?
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How often should I water my Large-leaved aster?
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How much water does my Large-leaved aster need?
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How should I water my Large-leaved aster at different growth stages?
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How should I water my Large-leaved aster through the seasons?
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What's the difference between watering my Large-leaved aster indoors and outdoors?
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Key Facts About Large-leaved aster

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Attributes of Large-leaved aster

Lifespan
Perennial
Plant Type
Herb
Planting Time
Fall, Late spring
Bloom Time
Summer, Fall
Harvest Time
Fall
Plant Height
15 cm to 91 cm
Spread
30 cm
Leaf Color
Green
Flower Size
2.5 cm
Flower Color
White
Purple
Yellow
Blue
Fruit Color
Brown
Yellow
Orange
Stem Color
Purple
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
5 - 32 ℃
Pollinators
Beetles, Wasps, Flies, Butterflies
Benefits to Pollinating Insects
Adult food, Larval food
Growth Rate:Moderate
Over the course of Spring, Summer, and Fall, large-leaved aster cultivates a moderate growth rate. This pace ensures consistent development, enhancing foliage density and size with the advent of each season. Fluctuations in growth occur seasonally, with Spring denoting a surge while Fall tapering is visible. This rhythm in growth rate uniquely culminates in large-leaved aster's sturdy yet distinctly expansive morphology.
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Symbolism

Usages

Garden Use

Scientific Classification of Large-leaved aster

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Quickly Identify Large-leaved aster

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1
Large heart-shaped leaves up to 8 inches (20 cm) across.
2
Clusters of lavender or bluish flowers with yellow centers, 1-1.5 inches (2.5-4 cm) in diameter.
3
Sturdy stems with a slightly hairy texture.
4
Daisy-like star-shaped flowers, 1-2 inches (2.5-5 cm) wide, with yellow disc florets.
5
Dry indehiscent seeds (achenes) with fluffy pappus, 0.08-0.12 inches (2-3 mm) in size.
Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image Large-leaved aster identify image
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pests

Common Pests & Diseases About Large-leaved aster

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Common issues for Large-leaved aster based on 10 million real cases
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Brown blotch
Brown spot is a disease that affects Large-leaved aster by causing lesions on the leaves that can lead to a decline in the plant's health. It is caused by various factors and can be managed through proper practices and treatments.
Learn More About the Brown blotch 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
Aged yellow and dry
Aged yellow and dry Aged yellow and dry Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Solutions: If the yellowing and drying of leaves and flowers is a natural progression due to age, nothing can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
Learn More About the Aged yellow and dry more
Leaf deformity
Leaf deformity Leaf deformity Leaf deformity
Leaf deformities can have a variety of causes.
Solutions: Follow these steps to revive plants with abnormal leaves. Remove damaged leaves: Plants can recover from damage when given the time to do so. Remove any deformed leaves so they don't continue drawing energy from the plant. This also creates room for healthier ones to grow. Stop using herbicide: Though herbicide damage is challenging to diagnose, gardeners can potentially prevent deformed leaves by not using any and by strictly following manufacturers instructions. Spray insecticide: Prevent pests from inhabiting plant leaves by spraying with insecticide regularly and practicing good natural pest prevention techniques. Apply a balanced fertilizer: Solve nutrient deficiencies and excesses by using a well-balanced fertilizer (organic or conventional both work) before planting, and consider topdressing when signs of stress are apparent. Fix watering schedule: If plant leaves are curled downward due to too much or too little water, adjust the watering schedule so the soil is moist, but not damp. Remove infected plants: If the plant has succumbed to a viral infection, not much can be done to revive it. Remove and destroy all compromised plant material to prevent spread to other plants.
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Brown blotch
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Brown blotch Disease on Large-leaved aster?
What is Brown blotch Disease on Large-leaved aster?
Brown spot is a disease that affects Large-leaved aster by causing lesions on the leaves that can lead to a decline in the plant's health. It is caused by various factors and can be managed through proper practices and treatments.
Symptom Analysis
Symptom Analysis
The main symptoms on Large-leaved aster are the development of small, circular brown spots on the leaves, which may coalesce into larger blotches. The leaves often yellow and wither as the disease progresses.
What Causes Brown blotch Disease on Large-leaved aster?
What Causes Brown blotch Disease on Large-leaved aster?
1
Fungal pathogen
The primary cause of Brown spot is a type of fungus called Bipolaris oryzae, which thrives in warm, humid conditions.
2
Moist conditions
The disease is more likely to occur in wet environments, where water splashes can spread the spores across the leaves.
How to Treat Brown blotch Disease on Large-leaved aster?
How to Treat Brown blotch Disease on Large-leaved aster?
1
Non pesticide
Sanitation: Remove and destroy infected plant matter to prevent the spread of the disease.

Improve circulation: Allow enough space between plants and prune excess foliage to improve air circulation and reduce leaf dampness.
2
Pesticide
Fungicide application: Apply a suitable fungicide, such as chlorothalonil or mancozeb, according to label instructions.
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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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Aged yellow and dry
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Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Overview
Overview
Regardless of the type of plant or where it is grown, at some point, it will begin to aged yellow and dry. This is a natural, unavoidable process that happens when the plant has completed all of the steps in its life.
Annual plants go through this process at the end of a single growing season. Perennial plants live for multiple years, if not tens or hundreds of years, but will still ultimately exhibit these symptoms.
Symptom Analysis
Symptom Analysis
When plants have progressed through their natural developmental stages and are nearing the end of their lifecycle, they begin showing signs of decline. Leaves will start to yellow and droop, and over time they turn papery brown and dry.
Once completely dry, the leaves begin to fall from the plant until the entire plant has dried out.
Disease Cause
Disease Cause
At the end of its life, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence or natural aging and death. Cell division stops, and the plant begins catabolizing resources to use in other parts of the plant.
As this happens, the tissues begin yellow and drying until the entire plant is desiccated and perishes.
Solutions
Solutions
If the yellowing and drying of leaves and flowers is a natural progression due to age, nothing can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
Prevention
Prevention
Unfortunately, there is no way to prevent plants from dying of “old age.” To help prolong their life, and put off symptoms of aged yellow and dry for as long as possible, take care of them by giving them enough water, fertilizing them appropriately, and making sure they get enough sunlight.
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Leaf deformity
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Leaf deformity
Leaf deformities can have a variety of causes.
Overview
Overview
Leaf deformity manifests in the form of curled, cupped, or distorted leaves, often first seen in the spring. There are a number of different possibilities as to the cause and it will not always be easy to isolate the problem without laboratory analysis. In the majority of cases, however, the gardener should be able to isolate the cause through close examination of the plant and the local conditions.
Symptom Analysis
Symptom Analysis
The plant has developed abnormal leaves. They may look similar to leaf curl, but show other problems such as:
  • stunting
  • abnormal shapes
  • a bumpy texture
  • gaps between leaf sections
  • raised growths on the top surface
Disease Cause
Disease Cause
The causes are widespread and varied and the gardener will need to examine plants carefully as well as consider environmental factors.
Disease due to insect damage: Mites, aphids, and other insects that feast on plant leaves can leave them vulnerable to viral and bacterial disease. Some, like leaf galls and rust, produce distorted leaves. If the gardener sees insects on the plants, it is likely the insect is the culprit. Some mites are too small to see, and laboratory analysis may be required.
Herbicide exposure: Herbicides can stress plant leaves. This may lead to stunted growth and a curling, cupped appearance. Even if the plant owner didn't apply herbicides, herbicide drift and planting in contaminated soils can expose plants to these chemicals. If all plants in an area have deformed leaves, the cause is likely herbicides. Herbicide exposure is also characterized by narrow new leaves.
Less than ideal growing conditions: If plants are exposed to cold temperatures right as their leaves are coming out of the bud, they might become stunted and malformed. If deformed leaves occur right after a cold spell or frost, this is likely the cause. Too much and too little water can also cause deformed leaves. Leaves curling down but not distorting is more likely to be a watering issue than a leaf deformity.
Nutrient deficiencies: A lack of critical nutrients during the growing phase, including boron, calcium, and molybdenum, may lead plant leaves to grow stunted or disfigured. If a nutrient deficiency is to blame, the leaves will also show discoloring.
Fungal infections: a variety of fungal pathogens can distort leaves, as is the case with Peach leaf curl.
Solutions
Solutions
Follow these steps to revive plants with abnormal leaves.
  1. Remove damaged leaves: Plants can recover from damage when given the time to do so. Remove any deformed leaves so they don't continue drawing energy from the plant. This also creates room for healthier ones to grow.
  2. Stop using herbicide: Though herbicide damage is challenging to diagnose, gardeners can potentially prevent deformed leaves by not using any and by strictly following manufacturers instructions.
  3. Spray insecticide: Prevent pests from inhabiting plant leaves by spraying with insecticide regularly and practicing good natural pest prevention techniques.
  4. Apply a balanced fertilizer: Solve nutrient deficiencies and excesses by using a well-balanced fertilizer (organic or conventional both work) before planting, and consider topdressing when signs of stress are apparent.
  5. Fix watering schedule: If plant leaves are curled downward due to too much or too little water, adjust the watering schedule so the soil is moist, but not damp.
  6. Remove infected plants: If the plant has succumbed to a viral infection, not much can be done to revive it. Remove and destroy all compromised plant material to prevent spread to other plants.
Prevention
Prevention
  1. Fertilize properly. Keep your plants full of essential nutrients with a balanced fertilizer.
  2. Regularly monitor for pests. Remove all pests by hand or treat them with an insecticide. Early discovery and treatment will prevent the spread of pests and diseases.
  3. Provide the proper amount of water. Water until the soil is moist, but not damp. Only once the soil dries out, should the plant be watered again.
  4. Protect plants from cold. Bring plants indoors or protect them with frost cloth when bad weather is forecast.
  5. Avoid herbicide exposure. If the gardener or surrounding neighbors are applying herbicides, consider moving vulnerable plants to where they are less exposed to any chemicals that may be carried on the wind.
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distribution

Distribution of Large-leaved aster

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Habitat of Large-leaved aster

Forests, aspen, pine or open spruce woodlands, thickets, clearings, shaded roadsides
Northern Hemisphere
South Hemisphere

Distribution Map of Large-leaved aster

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Plants Related to Large-leaved aster

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Lighting
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Indoor
Indoor
Outdoor
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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
Large-leaved aster appreciates significant yet not overwhelming exposure to the sun, while also having resilience to a broad variety of sun conditions, including full day illumination as well as very low-light areas. Its origin habitat suggests a cool environment, and too much sun exposure might impede its growth, whereas too little might negatively affect its healthy development.
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
Large-leaved aster 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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(Symptom details and solutions)
Small leaves
New leaves may grow smaller in size compared to the previous ones once they have matured.
Leggy or sparse growth
The spaces between leaves or stems of your large-leaved aster 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.
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.
Slower or no new growth
Large-leaved aster 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.
Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
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
Large-leaved aster 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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Outdoor
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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
The large-leaved aster prefers a native growth environment with cool-temperate climates with temperatures ranging from 5 to 32 ℃ (41 to 90 ℉). In the summer months, it is recommended to provide partial shade and keep the temperature range between 18 to 24 ℃ (64 to 75 ℉). During winter, it's advised to maintain temperatures between 10 to 15 ℃ (50 to 59 ℉) to promote dormancy.
Regional wintering strategies
Large-leaved aster 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 covering the plant with materials such as soil or straw. 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 Large-leaved aster
Large-leaved aster 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, there may be a decrease in sprouting or even no sprouting during springtime.
Solutions
In spring, remove any parts that have failed to sprout.
Symptoms of High Temperature in Large-leaved aster
During summer, Large-leaved aster 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, prone to curling, susceptible to sunburn, and in severe cases, the entire plant may wilt and become dry.
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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