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Shiitake
Shiitake
Shiitake
Shiitake
Shiitake
Shiitake
Shiitake
Lentinula edodes
Also known as : Oakwood mushroom, Sawtooth oak mushroom
Hardiness Zones
Hardiness Zones
4 to 9
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Care Guide for Shiitake

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Soil Care
Soil Care
Slightly acidic
Details on Soil Care Soil Care
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Partial sun
Details on Sunlight Requirements Ideal Lighting
Ideal Temperature
Ideal Temperature
4 to 9
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Questions About Shiitake

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Pruning Pruning Pruning
How can I prune my Shiitake?
Pruning your Shiitake is a fairly simple process. First, you will need a reliable set of hand pruners or hedge trimmers. You may use a clean pair of sharp scissors if you don’t have pruners or garden shears on hand. It’s important to always clean your gardening tools before and after using them to prevent the possibility of spreading disease or infection to other plants. To prune your Shiitake simply allow your plant to go dormant over the Winter. Some time between late winter and early spring – or when new growth starts to appear – take your clean pruners or trimmers and cut away any dying, damaged, yellow or declining foliage. Repeat this process until you reach the base of the plant or until there are no dead pieces left to cut. When pruning, be careful not to damage the new growth that may be emerging near the base of your plant. These parts cannot be restored and pruning can increase the ventilation of the plants and facilitate their growth. Any pruning that is done to this plant should be cut straight across the blades or stems. No angled cuts are required. Diseased leaf blade foliage can be removed as it appears. This could be done anytime when your Shiitake is growing.
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What should I do after pruning my Shiitake?
Once you’ve pruned your plant, you should dispose of the stems and leaves either by composting the healthy ones or throwing out the diseased parts. You can also fertilize just before or after pruning, which gives Shiitake a little vitamin boost that can provide it the nutrients needed to better protect itself from any nearby pathogens or diseases. Do not water the Shiitake immediately after pruning as this can lead to fungal infestation of the plants through the wounds. You don’t need much after care when you’re done pruning. It might benefit from light watering and some liquid plant food to encourage new growth.
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How can I prune my Shiitake during different seasons?
Early spring and late winter are the best times to prune your Shiitake on a large scale. If you want to control the size of your Shiitake, you can prune them as you wish, but be careful not to prune more than a third of the size of the plant. Yellow and diseased leaves may appear during the summer months when the Shiitake is growing vigorously and these types of leaves need to be pruned back immediately. These parts of the Shiitake cannot be restored and pruning increases the ventilation of the plant and facilitates its growth.
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When should I prune my Shiitake through different stages of growth?
Strategic pruning is usually done at different times of the year or during certain stages of growth depending on the plant. However, knowing when to prune your Shiitake depends on where you live and how established your plant is. For example, if your Shiitake is a new resident, it’s a good idea to wait until the plant starts to grow back before you start pruning. On the other hand, if your plant is already established, you will want to prune the dry or dead parts in plant before new leafy growth appears in early spring or late winter. This is the time of year when plants are dormant and pruning causes the least damage to them. This is also the best time of year to do more extensive pruning. It’s important to note that if Shiitake is pruned too late in the season, it can leave new growth at risk for damage or disease. However, if your Shiitake is indoors this is not a problem and you can prune at any time. Since this can affect the long-term health and appearance of your plant, it’s important to keep this in mind when deciding when and how to prune. As your Shiitake grows larger over time, you can trim it as needed after annual pruning. Dead, damaged, or diseased leaf blade foliage can be removed as it appears. This could be done anytime when your Shiitake is growing.
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Key Facts About Shiitake

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Attributes of Shiitake

Lifespan
Perennial
Plant Height
3 inches
Spread
10-20 cm
Leaf type
Semi-evergreen
Ideal Temperature
5 - 35 ℃

Scientific Classification of Shiitake

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Common Pests & Diseases About Shiitake

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Common issues for Shiitake based on 10 million real cases
Fruit withering
Fruit withering Fruit withering
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Fruit Spot
Fruit Spot Fruit Spot
Fruit Spot
Pathogenic infections can cause spots (typically black or brown) to appear on the fruit.
Solutions: Prune regularly - prune as a preventative measure as well as to remove any plants and plant parts affected by fruit Spot. Improve air circulation and drainage Fertilize as needed Spray applications - there are few programs that are effective at controlling fruit Spot for home growers, but the local cooperative extension may be able to provide information regarding potential chemical treatments if the disease is severe.
Wilting after blooming
Wilting after blooming Wilting after blooming
Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Soil mold
Soil mold Soil mold
Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Solutions: Measures to take to remove soil mold: Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface. Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
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Fruit withering
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Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
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Fruit Spot
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Fruit Spot
Pathogenic infections can cause spots (typically black or brown) to appear on the fruit.
Overview
Overview
If there are brown or black spots on the unripened fruits of plants, there is a good chance that fruit Spot could be to blame. This is an informal term used to describe several types of diseases that all cause these same symptoms: unattractive spots on fruits and vegetables.
There are a few different culprits behind fruit Spot, including bacterial spot, bacterial speck, and other related diseases (like early blight). Here are some symptoms and potential solutions to consider.
Symptom Analysis
Symptom Analysis
The symptoms of fruit Spot vary depending on which type of plant is affected as well as by which specific pathogen is to blame. Just about every type of plant can be affected by fruit Spot, including tomatoes, pears, plums, onions, strawberries, celery, peaches, and more.
Here are some examples of potential symptoms:
Small Fruit Spot
Small spots are most commonly associated with bacterial speck.
  • Spots may appear on fruits as well as leaves and other aboveground areas of the plant
  • Small black specks appear on infected fruits (spots are less than 1/16” in diameter)
  • Spots are raised with distinct margins, developing into sunken pits as the fruit matures
  • Fruit tissue near the spot stays green longer than the rest of the fruit
  • Spots are dark brown to black in color, with nearby spots often growing together
Large Fruit Spot
Large spots are often seen on plants suffering from bacterial spot, early blight, and related diseases.
  • Spots are large, sometimes larger than 1.3 cm
  • Some spots may look like targets with a brown to greyish coloration
  • Older spots are black and raised with lobed borders
  • Spots are superficial only, not penetrating into the seed cavity
  • Spots may turn into sunken pits, turning into craters as they get older
  • The skin of the fruit can be cracked and produce a water-soaked border
  • Some spots may ooze a gelatinous substance
Disease Cause
Disease Cause
There are a few culprits behind the fruit Spot. These depend on the pathogen as well as the type of plant. Bacterial speck and bacterial spot are both common diseases that can affect tomatoes, ground cherries, and other plants.
Bacterial speck is caused by Pseudomonas syringae. First discovered in the United States in 1933, it is most common in tomatoes and nearby weeds but can affect other kinds of plants and their fruits, too. It is more prevalent in low temperatures (less than 24 ℃) and high moisture.
Bacterial spot is caused by Xanthomonas campestris pv. Vesicatoria. First discovered in Texas in 1912, this disease is more common in warm weather and conditions of high moisture.
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Wilting after blooming
plant poor
Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
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Soil mold
plant poor
Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Overview
Overview
If there is soil mold around the plants, this isn't necessarily a reason to panic. Mold can occur for several reasons. Most of the time, it's harmless. The microorganisms that exist in mold are, in fact, necessary for healthy plant life. That said, it can be unsightly and in some cases, harmful to certain plants. It's important to understand why mold might be forming. It is only after the potential causes have been identified that steps can be taken to stop mold from spreading or appearing in the future.
Symptom Analysis
Symptom Analysis
The most obvious sign of soil mold is, of course, mold observed on the surface of the soil. This can be fuzzy and white, yellow, or gray in color. Other symptoms may include:
  • Mushrooms
  • Wilted plants
  • Plants are stunted in growth
  • Soil has an odd "off" smell
  • Premature leaf drop or flower/blossom/fruit rot
  • Excess water is leaking from drainage holes
While soil mold doesn't always harm the growth of a plant, it can indicate the presence of a larger problem that needs to be addressed (and these problems can often harm plants).
Disease Cause
Disease Cause
There are several causes for soil mold. Understanding why mold is growing should be the first step in deciding on the best course of action.
Some potential causes include:
  • Overwatering - fungi consume excess water, so the presence of mold indicates that there is water that the plants aren't readily using
  • Poor drainage - this can be caused by dense, compacted soil, a lack of drainage holes, or an inadequate pot size
  • Poor air circulation - this is common in indoor-grown plants, especially in the winter when windows are closed
  • Contaminated soil - while all soil contains microorganisms, soil can contain fungal spores that lead to mold growth
  • Decomposing leaves on the soil surface feed the mold
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More Info on Shiitake Growth and Care

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Basic Care Guide
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Transplant
5-6 inches
The perfect time to transplant shiitake is during the S2-S4 season (better termed Late Spring to Early Autumn) with their warm, damp conditions. Ensure shiitake is in a partially shaded location. If needed, increasing the area's humidity can aid the process. Remember, successful transplanting is about mimicking shiitake's natural habitat.
Transplant Techniques
Temperature
-25 - 38 ℃
Shiitake thrives in an environment replicating their native climate, favoring temperatures between 41 to 95°F (5 to 35°C). Periodic adjustments may be necessary to align with seasonal variations ensuring optimal growth.
Temp for Healthy Growth
Feng shui direction
East
The shiitake plant purportedly balances Yin and Yang in locales facing East. This Feng Shui compatibility stems from the plant's inherent resilience and the vitality of its earthy vibe. However, interpretation may vary, underscoring the idiosyncratic nature of Feng Shui practice.
Fengshui Details
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Plants Related to Shiitake

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Swan's-neck thyme-moss
Swan's-neck thyme-moss
A very common moss, the swan's-neck thyme-moss forms dense, soft tufts there were once used traditionally as a stuffing for mattresses. It grows in wet habitats, with constantly open spores that absorb water. It provides a habitat for numerous insects, frogs, and fungi.
Alpine rose
Alpine rose
Alpine rose (Rosa pendulina) is a deciduous perennial shrub that will grow to 1.8 m tall. A nearly thornless rose bush that produces rich pink flowers with bright yellow centers. Blooms profusely in spring, producing one single flower on each stem. Thrives in full sun and prefers rich, well-drained soil.
Kamala tree
Kamala tree
The kamala tree (Mallotus philippensis) is a tropical tree most notable for its bright orange-red seed pods that are valued for their dye-producing abilities. The tree is also grown for its wood. This tree is also grown ornamentally, largely because of its brightly colored fruit.
Fragrant aralia
Fragrant aralia
Fragrant aralia (Heteropanax fragrans) is a plant species native to southern Asia. Fragrant aralia is one of many tree species within the Heteropanax genus, and all the trees in the genus are native to Asia.
Hornbeam copperleaf
Hornbeam copperleaf
Hornbeam copperleaf (Acalypha persimilis) is summer annual that grows from 30 to 61 cm tall. It has large leaves and male and female flowers growing on the same bush. Cylindrical spikes with dense masses of tiny white flowers bloom from summer to fall. Female flowers are replaced by seed capsules that open when ripe and are dispersed by wind. This species prefers full sun to partial shade.
Catchfly prairie gentian
Catchfly prairie gentian
The catchfly prairie gentian is a perennial herb native to the southern US and the West Indies. It is salt tolerant and provides purple bell-shaped flowers in the blooming season. Catchfly prairie gentian is closely related to Texas bluebell (Eustoma russellianum) which is widely used as a cut flower.
Physalacriaceae
Physalacriaceae
Physalacriaceae is a family of fungi that includes different mushroom genera. Nearly all grow in the presence of aging or rotting wood, and they often grow gregariously. Among the more famous physalacriaceae species are the so-called honey mushrooms.
Agaricaceae
Agaricaceae
Agaricaceae is a cornerstone of the fungi world and encompasses many commonly found mushrooms. As a scientific family, it has over a thousand classified species! From tiny and toxic to massive and meaty, agaricaceae has a lot to offer. Research has found that it is an ancient family and could date back 20.44 million years ago.
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Shiitake
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Lentinula edodes
Also known as: Oakwood mushroom, Sawtooth oak mushroom
Hardiness Zones
Hardiness Zones
4 to 9
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Care Guide for Shiitake

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Questions About Shiitake

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Pruning Pruning Pruning
How can I prune my Shiitake?
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What should I do after pruning my Shiitake?
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How can I prune my Shiitake during different seasons?
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When should I prune my Shiitake through different stages of growth?
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Key Facts About Shiitake

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Attributes of Shiitake

Lifespan
Perennial
Plant Height
3 inches
Spread
10-20 cm
Leaf type
Semi-evergreen
Ideal Temperature
5 - 35 ℃
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Scientific Classification of Shiitake

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Common Pests & Diseases About Shiitake

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Common issues for Shiitake based on 10 million real cases
Fruit withering
Fruit withering Fruit withering Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Learn More About the Fruit withering more
Fruit Spot
Fruit Spot Fruit Spot Fruit Spot
Pathogenic infections can cause spots (typically black or brown) to appear on the fruit.
Solutions: Prune regularly - prune as a preventative measure as well as to remove any plants and plant parts affected by fruit Spot. Improve air circulation and drainage Fertilize as needed Spray applications - there are few programs that are effective at controlling fruit Spot for home growers, but the local cooperative extension may be able to provide information regarding potential chemical treatments if the disease is severe.
Learn More About the Fruit Spot more
Wilting after blooming
Wilting after blooming Wilting after blooming Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Learn More About the Wilting after blooming more
Soil mold
Soil mold Soil mold Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Solutions: Measures to take to remove soil mold: Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface. Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
Learn More About the Soil mold more
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Fruit withering
plant poor
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
Solutions
Solutions
There are a number of appropriate solutions to control fruit withering:
  1. Remove any fruit as soon as it shows any signs of infection. Do not compost.
  2. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Prevention
Prevention
Preventative measures include:
  1. Ensuring adequate spacing between plants or trees.
  2. Staking plants that are prone to tumbling to prevent moisture or humidity build up.
  3. Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
  4. Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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Fruit Spot
plant poor
Fruit Spot
Pathogenic infections can cause spots (typically black or brown) to appear on the fruit.
Overview
Overview
If there are brown or black spots on the unripened fruits of plants, there is a good chance that fruit Spot could be to blame. This is an informal term used to describe several types of diseases that all cause these same symptoms: unattractive spots on fruits and vegetables.
There are a few different culprits behind fruit Spot, including bacterial spot, bacterial speck, and other related diseases (like early blight). Here are some symptoms and potential solutions to consider.
Symptom Analysis
Symptom Analysis
The symptoms of fruit Spot vary depending on which type of plant is affected as well as by which specific pathogen is to blame. Just about every type of plant can be affected by fruit Spot, including tomatoes, pears, plums, onions, strawberries, celery, peaches, and more.
Here are some examples of potential symptoms:
Small Fruit Spot
Small spots are most commonly associated with bacterial speck.
  • Spots may appear on fruits as well as leaves and other aboveground areas of the plant
  • Small black specks appear on infected fruits (spots are less than 1/16” in diameter)
  • Spots are raised with distinct margins, developing into sunken pits as the fruit matures
  • Fruit tissue near the spot stays green longer than the rest of the fruit
  • Spots are dark brown to black in color, with nearby spots often growing together
Large Fruit Spot
Large spots are often seen on plants suffering from bacterial spot, early blight, and related diseases.
  • Spots are large, sometimes larger than 1.3 cm
  • Some spots may look like targets with a brown to greyish coloration
  • Older spots are black and raised with lobed borders
  • Spots are superficial only, not penetrating into the seed cavity
  • Spots may turn into sunken pits, turning into craters as they get older
  • The skin of the fruit can be cracked and produce a water-soaked border
  • Some spots may ooze a gelatinous substance
Disease Cause
Disease Cause
There are a few culprits behind the fruit Spot. These depend on the pathogen as well as the type of plant. Bacterial speck and bacterial spot are both common diseases that can affect tomatoes, ground cherries, and other plants.
Bacterial speck is caused by Pseudomonas syringae. First discovered in the United States in 1933, it is most common in tomatoes and nearby weeds but can affect other kinds of plants and their fruits, too. It is more prevalent in low temperatures (less than 24 ℃) and high moisture.
Bacterial spot is caused by Xanthomonas campestris pv. Vesicatoria. First discovered in Texas in 1912, this disease is more common in warm weather and conditions of high moisture.
Solutions
Solutions
  • Prune regularly - prune as a preventative measure as well as to remove any plants and plant parts affected by fruit Spot.
  • Improve air circulation and drainage
  • Fertilize as needed
  • Spray applications - there are few programs that are effective at controlling fruit Spot for home growers, but the local cooperative extension may be able to provide information regarding potential chemical treatments if the disease is severe.
Prevention
Prevention
There are several ways to prevent both types of fruit Spot from affecting yields and harvests:
  • Rotate crops - do not plant the same kind of plant in the same spot each year, instead switching out locations every two to three years
  • Use disease-free seeds and transplants - using a hot water treatment to sterilize seeds before planting can also be effective
  • Irrigate early in the day to give plants time to dry off before nightfall
  • Avoid working around plants when they are wet
  • Control weeds
  • Remove debris or plow it under at the end of the growing season
  • Fertilize with higher amounts of nitrogen and use less calcium
  • Plant resistant cultivars when available
  • Do not clip plants when transplanting
  • Dispose of affected plant parts immediately (do not compost)
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Wilting after blooming
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Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
Solutions
Solutions
  • Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water.
  • Water according to recommendations for each plant's species.
  • Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too.
  • Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants.
  • Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Prevention
Prevention
  • Read up on moisture, light, and soil type preferences for each plant to avoid underwatering, incorrect light levels, or other conditions that can cause wilting blooms.
  • Avoid re-potting during the flowering period. This causes additional stress on the plants because they need to repair root damage and adapt to the new micro-environment, all of which can result in wilting.
  • One other potential cause is ethylene gas, a plant hormone related to ripening. Some fruits and vegetables emit ethylene, especially bananas. Apples, grapes, melons, avocados, and potatoes can also give it off, so keep flowering plants away from fresh produce.
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Soil mold
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Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Overview
Overview
If there is soil mold around the plants, this isn't necessarily a reason to panic. Mold can occur for several reasons. Most of the time, it's harmless. The microorganisms that exist in mold are, in fact, necessary for healthy plant life. That said, it can be unsightly and in some cases, harmful to certain plants. It's important to understand why mold might be forming. It is only after the potential causes have been identified that steps can be taken to stop mold from spreading or appearing in the future.
Symptom Analysis
Symptom Analysis
The most obvious sign of soil mold is, of course, mold observed on the surface of the soil. This can be fuzzy and white, yellow, or gray in color. Other symptoms may include:
  • Mushrooms
  • Wilted plants
  • Plants are stunted in growth
  • Soil has an odd "off" smell
  • Premature leaf drop or flower/blossom/fruit rot
  • Excess water is leaking from drainage holes
While soil mold doesn't always harm the growth of a plant, it can indicate the presence of a larger problem that needs to be addressed (and these problems can often harm plants).
Disease Cause
Disease Cause
There are several causes for soil mold. Understanding why mold is growing should be the first step in deciding on the best course of action.
Some potential causes include:
  • Overwatering - fungi consume excess water, so the presence of mold indicates that there is water that the plants aren't readily using
  • Poor drainage - this can be caused by dense, compacted soil, a lack of drainage holes, or an inadequate pot size
  • Poor air circulation - this is common in indoor-grown plants, especially in the winter when windows are closed
  • Contaminated soil - while all soil contains microorganisms, soil can contain fungal spores that lead to mold growth
  • Decomposing leaves on the soil surface feed the mold
Solutions
Solutions
Measures to take to remove soil mold:
  • Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface.
  • Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth
  • Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda
Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
Prevention
Prevention
Follow these practices to prevent soil mold from forming.
  • Limit moisture - avoid keeping soil damp, and allow it to dry out between waterings. Watering from the bottom of pots with drainage can allow the surface soil to stay dry.
  • Provide aeration - increase airflow around the plants using a fan or wind.
  • Repot - if the container is too small or lacks proper drainage, transplant the plant into a new, better-draining container.
  • Apply a layer of sand - apply 6 mm of sand on top of soil.
  • Use potting mix - when planting, only use potting mix instead of regular soil, as this is specially formulated for the proper moisture retention.
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More Info on Shiitake Growth and Care

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Temperature
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Requirements
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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
Shiitake thrives in an environment replicating their native climate, favoring temperatures between 41 to 95°F (5 to 35°C). Periodic adjustments may be necessary to align with seasonal variations ensuring optimal growth.
Discover information about plant diseases, toxicity, weed control and more.
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