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Black mondo grass 'Kokuryu'
Ophiopogon planiscapus 'Kokuryu'
Also known as : Mondo grass 'Kokuryu'
Black mondo grass 'Kokuryu' is a unique Black mondo grass cultivar with vibrant lavender or purple flowers. The parent plant and other varieties usually have white or lilac flowers. 'Kokuryu' translates to 'Black Dragon' and refers to this cultivar's black foliage. Gardeners love to plant this grass as a unique form of groundcover.
Hardiness Zones
5 to 9
Care Guide for Black mondo grass 'Kokuryu'
Feedback
Watering Care
Average water needs, watering when the top 3 cm of soil has dried out.
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Black mondo grass 'Kokuryu'
Water
Every week
Hardiness Zones
5 to 9
Key Facts About Black mondo grass 'Kokuryu'
Feedback
Attributes of Black mondo grass 'Kokuryu'
Lifespan
Perennial
Plant Type
Grass
Bloom Time
Late spring, Summer, Early fall
Plant Height
20 cm
Spread
50 cm
Leaf Color
Black
Green
Flower Color
Purple
Pink
Fruit Color
Blue
Stem Color
Black
Leaf type
Evergreen
Ideal Temperature
5 - 35 ℃
Scientific Classification of Black mondo grass 'Kokuryu'
Phylum
Vascular plants
Class
Monocotyledons
Order
Asparagus and allies
Family
Asparagus
Genus
Lilyturfs
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Common Pests & Diseases About Black mondo grass 'Kokuryu'
Feedback
Common issues for Black mondo grass 'Kokuryu' based on 10 million real cases
Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Solutions: The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves. Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement. Protect trees from severe root damage of nearby construction and excavation. If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach. If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry. Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections. If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
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.
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Treat and prevent plant diseases.
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Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Overview
Leaf scorch refers to two general conditions: physiological leaf scorch and bacterial leaf scorch. It causes leaves to discolor starting along the margins, and eventually die.
Leaf scorch development is most common in the hot, dry season, becoming most noticeable in late summer. However, it can occur at other times of the year. It most often affects young trees and shrubs, but it can also affect flowers, vegetables, and other plants.
Leaf scorch can get progressively worse over multiple seasons. If the root causes are not addressed, leaf scorch can lead to plant death.
While you cannot reverse the damage caused by physiological leaf scorch, you can prevent further damage. With proper management, plants will fully recover. However, there is no cure for bacterial leaf scorch, which is a systemic infection.
Symptom Analysis
- Yellow, brown, or blackened leaves starting with the leaf margins
- Dying twig tips on trees and shrubs as leaves die and fall
- Often there is a bright yellow border line between the dead and living leaf tissue
Disease Cause
There are numerous contributing causes of leaf scorch.
Bacterial leaf scorch is caused by the bacterium Xylella fastidiosa. The bacteria block the xylem vessels, preventing water movement. Symptoms may vary across species.
Physiological leaf scorch most commonly occurs when a plant cannot take up enough water. Numerous conditions can lead to this issue, particularly an unhealthy root system. Some causes of an unhealthy root system include overly-compacted soil, recent tillage, root compaction and severing due to pavement or other construction, drought, and overly-saturated soils.
Potassium deficiency can contribute to leaf scorch. Since plants need potassium to move water, they cannot properly move water when there is a lack of potassium.
Too much fertilizer can also cause leaf scorch symptoms. The accumulation of salts (including nutrient salts from fertilizers, as well as salt water) accumulate at the leaf margins and may build up to concentrations that burn the tissues.
Continue reading in our app - it's better
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Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
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
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
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.
Continue reading in our app - it's better
A database of 400000+ plants and unlimited guides at your fingertips...
Scan the QR code with your phone camera to download the app
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Each source of scarring requires a different approach to help your plant recover.
- Protect the trunk and leaves from physical damage like scrapes.
- If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
- Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
- Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
- Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
- Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
- Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
Continue reading in our app - it's better
A database of 400000+ plants and unlimited guides at your fingertips...
Scan the QR code with your phone camera to download the app
Continue reading in our app - it's better
A database of 400000+ plants and unlimited guides at your fingertips...
Your Ultimate Guide to Plants
Identify grow and nurture the better way!
17,000 local species +400,000 global species studied
Nearly 5 years of research
80+ scholars in botany and gardening
Botanist in your pocket
Scan the QR code with your phone camera to download the app
About
Care Guide
More Info
Pests & Diseases
Black mondo grass 'Kokuryu'
Ophiopogon planiscapus 'Kokuryu'
Also known as: Mondo grass 'Kokuryu'
Black mondo grass 'Kokuryu' is a unique Black mondo grass cultivar with vibrant lavender or purple flowers. The parent plant and other varieties usually have white or lilac flowers. 'Kokuryu' translates to 'Black Dragon' and refers to this cultivar's black foliage. Gardeners love to plant this grass as a unique form of groundcover.
Hardiness Zones
5 to 9
Care Guide for Black mondo grass 'Kokuryu'
Feedback
Watering Care
Average water needs, watering when the top 3 cm of soil has dried out.
Soil Care
Sand, Acidic, Neutral
Ideal Lighting
Full sun, Partial sun
Ideal Temperature
5 to 9
Know the light your plants really get.
Find the best spots for them to optimize their health, simply using your phone.
Download the App
Download
Key Facts About Black mondo grass 'Kokuryu'
Feedback
Attributes of Black mondo grass 'Kokuryu'
Lifespan
Perennial
Plant Type
Grass
Bloom Time
Late spring, Summer, Early fall
Plant Height
20 cm
Spread
50 cm
Leaf Color
Black
Green
Flower Color
Purple
Pink
Fruit Color
Blue
Stem Color
Black
Leaf type
Evergreen
Ideal Temperature
5 - 35 ℃
Gain more valuable plant knowledge
Explore a rich botanical encyclopedia for deeper insights
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Scientific Classification of Black mondo grass 'Kokuryu'
Phylum
Vascular plants Class
Monocotyledons Order
Asparagus and allies Family
Asparagus Genus
Lilyturfs 
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Common Pests & Diseases About Black mondo grass 'Kokuryu'
Feedback
Common issues for Black mondo grass 'Kokuryu' based on 10 million real cases
Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Solutions: The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves. Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement. Protect trees from severe root damage of nearby construction and excavation. If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach. If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry. Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections. If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
Learn More About the Leaf scorch ![more]()
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]()
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Learn More About the Scars ![more]()
Treat and prevent plant diseases.
AI-powered plant doctor helps you diagnose plant problems in seconds.
Download the App
Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Overview
Leaf scorch refers to two general conditions: physiological leaf scorch and bacterial leaf scorch. It causes leaves to discolor starting along the margins, and eventually die.
Leaf scorch development is most common in the hot, dry season, becoming most noticeable in late summer. However, it can occur at other times of the year. It most often affects young trees and shrubs, but it can also affect flowers, vegetables, and other plants.
Leaf scorch can get progressively worse over multiple seasons. If the root causes are not addressed, leaf scorch can lead to plant death.
While you cannot reverse the damage caused by physiological leaf scorch, you can prevent further damage. With proper management, plants will fully recover. However, there is no cure for bacterial leaf scorch, which is a systemic infection.
Symptom Analysis
- Yellow, brown, or blackened leaves starting with the leaf margins
- Dying twig tips on trees and shrubs as leaves die and fall
- Often there is a bright yellow border line between the dead and living leaf tissue
Disease Cause
There are numerous contributing causes of leaf scorch.
Bacterial leaf scorch is caused by the bacterium Xylella fastidiosa. The bacteria block the xylem vessels, preventing water movement. Symptoms may vary across species.
Physiological leaf scorch most commonly occurs when a plant cannot take up enough water. Numerous conditions can lead to this issue, particularly an unhealthy root system. Some causes of an unhealthy root system include overly-compacted soil, recent tillage, root compaction and severing due to pavement or other construction, drought, and overly-saturated soils.
Potassium deficiency can contribute to leaf scorch. Since plants need potassium to move water, they cannot properly move water when there is a lack of potassium.
Too much fertilizer can also cause leaf scorch symptoms. The accumulation of salts (including nutrient salts from fertilizers, as well as salt water) accumulate at the leaf margins and may build up to concentrations that burn the tissues.
Solutions
The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms.
- Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves.
- Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement.
- Protect trees from severe root damage of nearby construction and excavation.
- If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach.
- If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry.
- Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections.
- If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
Prevention
- Physiological leaf scorch is best avoided by making sure your plants have a healthy, functional root system and access to enough water. Water regularly, especially on the mornings of excessively hot, sunny days. Deep, infrequent irrigation is better than shallow, frequent irrigation.
- Have your soil tested and apply the proper nutrients. Be sure to not over-apply fertilizers.
- Make sure your plants’ roots have room to expand. Avoid compacted soil as well and avoid paving areas above the root zone. Do not till or disturb the soil where plant roots are growing.
- Plant new trees and shrubs in the fall, so that they have the maximum amount of time to become established before the environmental stresses of the next summer.
- Remove any dead or dying plant tissue that may harbor secondary infections.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
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
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
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
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
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.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Each source of scarring requires a different approach to help your plant recover.
- Protect the trunk and leaves from physical damage like scrapes.
- If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
- Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
- Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
- Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
- Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
- Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Your Ultimate Guide to Plants
Identify grow and nurture the better way!
17,000 local species +400,000 global species studied
Nearly 5 years of research
80+ scholars in botany and gardening
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
