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Black garlic
Black garlic
Black garlic
Allium nigrum
Also known as : Broadleaf garlic
Black garlic (Allium nigrum) is a species of wild onion that is native to the Middle East. Despite its common name, black garlic produces creamy white flowers with green centers; these are small and grow in dense clusters from a single flower spike.
Hardiness Zones
Hardiness Zones
7 to 10
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care guide

Care Guide for Black garlic

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Watering Care
Watering Care
Average water needs, watering when the top 3 cm of soil has dried out.
Details on Watering Care Watering Care
Fertilizing Care
Fertilizing Care
Fertilization once in spring.
Details on Fertilizing Care Fertilizing Care
Pruning
Pruning
Trim the diseased, withered leaves once a month.
Details on Pruning Pruning
Soil Care
Soil Care
Clay, Loam, Acidic, Neutral, Alkaline
Details on Soil Care Soil Care
Repotting
Repotting
Needs excellent drainage in pots.
Details on Repotting Repotting
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Black garlic
Water
Water
Every week
Sunlight
Sunlight
Full sun
Hardiness Zones
Hardiness Zones
7 to 10
question

Questions About Black garlic

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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 Black garlic?
When watering the Black garlic, 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 Black garlic 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.
Read More more
What should I do if I water my Black garlic too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Black garlic, 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 Black garlic, 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 Black garlic have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Black garlic. 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 Black garlic 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 Black garlic 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 Black garlic?
If your plant is in a pot. The most precise way to decide whether your Black garlic 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 Black garlic 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 Black garlic can show an admirable ability to withstand drought.
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How much water does my Black garlic need?
When it comes time to water your Black garlic, 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.
Read More more
How should I water my Black garlic at different growth stages?
The water needs of the Black garlic can change depending on growth stages as well. For example, when your Black garlic 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 Black garlic 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 Black garlic 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 Black garlic more water at this time.
Read More more
How should I water my Black garlic through the seasons?
The Black garlic 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 Black garlic will contract a disease.
Read More more
What's the difference between watering my Black garlic indoors and outdoors?
It is most common to grow the Black garlic 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 Black garlic 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 Black garlic 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 Black garlic

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Attributes of Black garlic

Lifespan
Perennial
Plant Type
Herb
Planting Time
Early spring
Bloom Time
Late spring, Summer
Harvest Time
Mid spring, Late spring, Summer, Early fall, Mid fall
Plant Height
45 cm to 60 cm
Spread
10 cm
Leaf Color
Green
Gray
Silver
Flower Size
8 cm to 10 cm
Flower Color
White
Cream
Fruit Color
Green
Stem Color
Green
Gray
Silver
White
Cream
Leaf type
Deciduous
Ideal Temperature
15 - 35 ℃

Scientific Classification of Black garlic

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pests

Common Pests & Diseases About Black garlic

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Common issues for Black garlic based on 10 million real cases
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.
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.
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.
Root deformity
Root deformity Root deformity
Root deformity
Root deformities can have a variety of causes
Solutions: There are a few key steps to take if root deformity is suspected: Prevent the spread of fungal diseases - if a fungal pathogen is to blame for the root deformity, there’s not much to do once it sets into the soil. Prevent it from spreading by applying a fungicide or adjusting the soil pH based on what is needed for the specific type of plant. Do not re-use this soil for future plantings. Harvest selectively - for root vegetables like carrots or parsnips, the tubers may still be usable. Cull some of the crop or cut away affected areas, but the rest should still be safe to eat.
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Aged yellow and dry
plant poor
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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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.
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Brown spot
plant poor
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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Root deformity
plant poor
Root deformity
Root deformities can have a variety of causes
Overview
Overview
Although root deformity is a problem that can occur with just about any type of plant, it tends to be more noticeable in root crops such as carrots, parsnips, or potatoes. In any plant, it is important to address root deformity in its early stages so that they are able to grow to their fullest potential.
Symptom Analysis
Symptom Analysis
There are countless symptoms of root deformity and associated root problems in plants. In fact, these symptoms often co-occur with dozens of others, making it hard to tell which disease, pest, or environmental condition is responsible for a given plant’s suffering and failure to thrive.
Some of the most common symptoms you will see in plants with root deformity problems are:
  • Roots that are misshapen, rotten, or stunted
  • Roots that become brown and mushy as areas begin to die back
  • Stunted growth
  • Wilted or yellowing leaves
  • Premature leaf drop
  • Delayed blooming
Root deformity is not a disease that occurs on its own but is instead a symptom of many other common plant problems. Because of that, it is exceedingly important to examine all the issues to figure out what is going wrong.
Disease Cause
Disease Cause
There are several reasons why plants may develop malformed roots.
One of the most common is related to the environment. Environmental conditions related to moisture, soil structure, and nutrient load can commonly cause issues with root formation.
Not all soils are conducive to creating healthy roots. Roots need room to grow, spread, and breathe. When plants are grown in soil that is rocky or composed of heavy clay, it does not give them the opportunity to do so. Roots that do most of the “storage work” for plants, such as those of beets, kohlrabi, potatoes, carrots, turnips, and so on, are most likely to suffer from this cause.
There are various plant diseases that can cause plant roots to become malformed. These are generally plant- and species-specific but can include diseases such as root rot. Clubroot is another disease that typically affects plants in the mustard family, such as cabbage, broccoli, and Brussels sprouts.
There are even pests, such as root-knot nematodes, that can cause root damage, malformation, and death in a long list of plant species.
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distribution

Distribution of Black garlic

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Habitat of Black garlic

Disturbed roadsides
Northern Hemisphere
South Hemisphere

Distribution Map of Black garlic

Black garlic originally hails from the Mediterranean and adjoining regions of southwestern Europe and northern Africa. It has been introduced and thrives in various areas of central and northern Europe. Black garlic is also cultivated, indicating its adaptation beyond its native range for horticultural purposes.
distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
habit
care_scenes

More Info on Black Garlic Growth and Care

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Basic Care Guide
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Lighting
Full sun
Black garlic thrives under the unfiltered rays of the sun for an optimal portion of the day. This enhances its growth and health. It can also manage with sunlight scattering across its foliage for part of the day. Care should be taken as insufficient light can stunt growth, and excess exposure can lead to foliage burn.
Best Sunlight Practices
Transplant
4-6 inches
Black garlic's perfect timing for transplanting falls within the 'S1-S2' stretch, better coined as late winter to early spring. The locale for black garlic should have well-drained soil and receive full sun to partial shade. If needed, add some organic matter to enhance your plant's growth. As friendly advice, remember to respect boundaries when transplanting; black garlic needs its space.
Transplant Techniques
Temperature
-10 - 41 ℃
Black garlic is native to environments with moderate warmth. Its preferred temperature range spans 59 to 95 °F (15 to 35 ℃). In different seasons, necessary adjustments should aim at maintaining these temperatures.
Temp for Healthy Growth
Feng shui direction
North
Black garlic embodies a harmonious equilibrium, resonating ideally with the profound North. This compatibility is attributed to North's element water, which, in nature, purifies and renews, much like the transfomative process of black garlic. Yet, personalized interpretations of Feng Shui may yield differing perceptions.
Fengshui Details
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Plants Related to Black garlic

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Tea tree
Tea tree
Tea tree (Melaleuca alternifolia) is a native tree of Australia and will grow to 6 m tall. Commonly found growing along streams and waterways, it has a bushy crown and thin-white paper-like bark. Oil from the leaves of this tree is commonly known as tea tree oil. Blooms from spring to summer with fluffy white flowers. Thrives in full sun and prefers moist, well-drained soil.
Baseball plant
Baseball plant
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Maidenhair vine
Maidenhair vine
Maidenhair vine (Muehlenbeckia complexa) is a semi-deciduous vine that can grow to 4.5 m if it is given suitable supports on which to climb. However, it is most commonly grown as a houseplant. Maidenhair vine provides interesting ground cover.
Mealycup sage
Mealycup sage
The mealycup sage needs either full or partial sun in order to thrive. It can be an annual plant when grown in temperate climates and must be planted in times without frost in less temperate climates. There are a few varieties of mealycup sage, which can produce either violet, blue or white flowers.
Coast Oxtongue
Coast Oxtongue
Coast Oxtongue (Gasteria acinacifolia) is a succulent species endemic to South Africa. Sunbirds are attracted to coast Oxtongue nectar. This is a strictly coastal species and is considered ideal for coastal gardens, as it grows the largest of all the Gasteria species. This plant has cultural value to indigenous peoples of South Africa, some of whom believe it to have magical powers.
Poorjoe
Poorjoe
Poorjoe (Hexasepalum teres) is an annual herbaceous wildflower that grows from 30 to 91 cm tall. It blooms from summer to winter with small pinkish-white flowers. It thrives in full sun with dry soil and is commonly found growing in dunes sandy roadsides and dry locations. Is considered an invasive weed in some areas.
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.
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Related Plants
Black garlic
Black garlic
Black garlic
Allium nigrum
Also known as: Broadleaf garlic
Black garlic (Allium nigrum) is a species of wild onion that is native to the Middle East. Despite its common name, black garlic produces creamy white flowers with green centers; these are small and grow in dense clusters from a single flower spike.
Hardiness Zones
Hardiness Zones
7 to 10
more
question

Questions About Black garlic

feedback
Feedback
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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 Black garlic?
more
What should I do if I water my Black garlic too much or too little?
more
How often should I water my Black garlic?
more
How much water does my Black garlic need?
more
How should I water my Black garlic at different growth stages?
more
How should I water my Black garlic through the seasons?
more
What's the difference between watering my Black garlic indoors and outdoors?
more
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Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
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plant_info

Key Facts About Black garlic

feedback
Feedback
feedback

Attributes of Black garlic

Lifespan
Perennial
Plant Type
Herb
Planting Time
Early spring
Bloom Time
Late spring, Summer
Harvest Time
Mid spring, Late spring, Summer, Early fall, Mid fall
Plant Height
45 cm to 60 cm
Spread
10 cm
Leaf Color
Green
Gray
Silver
Flower Size
8 cm to 10 cm
Flower Color
White
Cream
Fruit Color
Green
Stem Color
Green
Gray
Silver
White
Cream
Leaf type
Deciduous
Ideal Temperature
15 - 35 ℃
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Scientific Classification of Black garlic

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pests

Common Pests & Diseases About Black garlic

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Common issues for Black garlic based on 10 million real cases
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
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
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
Root deformity
Root deformity Root deformity Root deformity
Root deformities can have a variety of causes
Solutions: There are a few key steps to take if root deformity is suspected: Prevent the spread of fungal diseases - if a fungal pathogen is to blame for the root deformity, there’s not much to do once it sets into the soil. Prevent it from spreading by applying a fungicide or adjusting the soil pH based on what is needed for the specific type of plant. Do not re-use this soil for future plantings. Harvest selectively - for root vegetables like carrots or parsnips, the tubers may still be usable. Cull some of the crop or cut away affected areas, but the rest should still be safe to eat.
Learn More About the Root deformity more
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Aged yellow and dry
plant poor
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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Fruit withering
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Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
  1. Both leaves and blossom on the tips of branches will go brown and wither.
  2. Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
  3. Any fruit that does appear will turn wrinkled and fail to develop.
  4. Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
Solutions
Solutions
There are a number of appropriate solutions to control fruit withering:
  1. Remove any fruit as soon as it shows any signs of infection. Do not compost.
  2. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Prevention
Prevention
Preventative measures include:
  1. Ensuring adequate spacing between plants or trees.
  2. Staking plants that are prone to tumbling to prevent moisture or humidity build up.
  3. Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
  4. Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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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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Root deformity
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Root deformity
Root deformities can have a variety of causes
Overview
Overview
Although root deformity is a problem that can occur with just about any type of plant, it tends to be more noticeable in root crops such as carrots, parsnips, or potatoes. In any plant, it is important to address root deformity in its early stages so that they are able to grow to their fullest potential.
Symptom Analysis
Symptom Analysis
There are countless symptoms of root deformity and associated root problems in plants. In fact, these symptoms often co-occur with dozens of others, making it hard to tell which disease, pest, or environmental condition is responsible for a given plant’s suffering and failure to thrive.
Some of the most common symptoms you will see in plants with root deformity problems are:
  • Roots that are misshapen, rotten, or stunted
  • Roots that become brown and mushy as areas begin to die back
  • Stunted growth
  • Wilted or yellowing leaves
  • Premature leaf drop
  • Delayed blooming
Root deformity is not a disease that occurs on its own but is instead a symptom of many other common plant problems. Because of that, it is exceedingly important to examine all the issues to figure out what is going wrong.
Disease Cause
Disease Cause
There are several reasons why plants may develop malformed roots.
One of the most common is related to the environment. Environmental conditions related to moisture, soil structure, and nutrient load can commonly cause issues with root formation.
Not all soils are conducive to creating healthy roots. Roots need room to grow, spread, and breathe. When plants are grown in soil that is rocky or composed of heavy clay, it does not give them the opportunity to do so. Roots that do most of the “storage work” for plants, such as those of beets, kohlrabi, potatoes, carrots, turnips, and so on, are most likely to suffer from this cause.
There are various plant diseases that can cause plant roots to become malformed. These are generally plant- and species-specific but can include diseases such as root rot. Clubroot is another disease that typically affects plants in the mustard family, such as cabbage, broccoli, and Brussels sprouts.
There are even pests, such as root-knot nematodes, that can cause root damage, malformation, and death in a long list of plant species.
Solutions
Solutions
There are a few key steps to take if root deformity is suspected:
  • Prevent the spread of fungal diseases - if a fungal pathogen is to blame for the root deformity, there’s not much to do once it sets into the soil. Prevent it from spreading by applying a fungicide or adjusting the soil pH based on what is needed for the specific type of plant. Do not re-use this soil for future plantings.
  • Harvest selectively - for root vegetables like carrots or parsnips, the tubers may still be usable. Cull some of the crop or cut away affected areas, but the rest should still be safe to eat.
Prevention
Prevention
There are several steps for preventing root deformity from impacting your plants;
  • Address spacing issues - one of the most common reasons for root deformity is plants that are growing too close together. Space plants according to the recommendations listed on the seed packet or in the planting guidelines.
  • Thin plants - some plants benefit from thinning after they have germinated. Consult the planting guidelines for each species, but know that removing all but the healthiest seedlings can provide them with the space they need to grow.
  • Improve soil quality - rocky and compacted soils can cause root deformity. Aerate the soil prior to planting and remove as many rocky or clay-dominated areas as possible.
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distribution

Distribution of Black garlic

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Habitat of Black garlic

Disturbed roadsides
Northern Hemisphere
South Hemisphere

Distribution Map of Black garlic

Black garlic originally hails from the Mediterranean and adjoining regions of southwestern Europe and northern Africa. It has been introduced and thrives in various areas of central and northern Europe. Black garlic is also cultivated, indicating its adaptation beyond its native range for horticultural purposes.
distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Black Garlic Growth and Care

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Basic Care Guide
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Plants Related to Black garlic

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Lighting
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Indoor
Outdoor
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Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun
Tolerance
About 3-6 hours 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
Black garlic thrives under the unfiltered rays of the sun for an optimal portion of the day. This enhances its growth and health. It can also manage with sunlight scattering across its foliage for part of the day. Care should be taken as insufficient light can stunt growth, and excess exposure can lead to foliage burn.
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
Black garlic thrives in full sunlight and is commonly grown outdoors where it receives ample sunlight. When placed in rooms with inadequate lighting, symptoms of light deficiency may not be readily apparent.
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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 Black garlic 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
Black garlic 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 ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.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
Black garlic thrives in full sun exposure and can tolerate intense sunlight. With their remarkable resilience, symptoms of sunburn may not be easily visible, as they rarely suffer from it.
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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
Black garlic is native to environments with moderate warmth. Its preferred temperature range spans 59 to 95 °F (15 to 35 ℃). In different seasons, necessary adjustments should aim at maintaining these temperatures.
Regional wintering strategies
Black garlic 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 Black garlic
Black garlic 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 Black garlic
During summer, Black garlic 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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