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Great masterwort
Astrantia maxima
Also known as : Hellebore-leaved masterwort
Astrantia maxima reaches on average 90 cm of height. The stem is erect and glabrous, with little branches and few leaves. The basal leaves have a long petiole 10 to 20 cm, 3 to 7 lobes and toothed segments. Size: 8 to 15 cm. 
Care Guide for Great masterwort
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Great masterwort
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Key Facts About Great masterwort
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Attributes of Great masterwort
Lifespan
Perennial
Plant Type
Herb
Plant Height
50 cm
Spread
50 cm
Leaf Color
Green
Flower Color
Pink
Leaf type
Semi-evergreen
Scientific Classification of Great masterwort
Phylum
Vascular plants
Class
Dicotyledons
Family
Umbellifers
Genus
Masterworts
Species
Great masterwort
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Common Pests & Diseases About Great masterwort
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Common issues for Great masterwort based on 10 million real cases
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Leaf beetles
Leaf beetles are a class of colored insects 1 to 2 cm in size. They gnaw on leaves and petals resulting in small, round holes scattered over the surface.
Solutions: For less serious cases: Remove beetles, nymphs, and eggs. Remove all life stages of the beetles and kill them by placing them in a bucket of warm, soapy water. This can be done more easily by placing the bucket under affected leaves and shaking the plant. This method is most effective in the afternoon when leaf beetles are more active. Always dispose of insects in a sealed bag or container to avoid escape and spread. To treat more serious infestations: Apply organic insecticides. Use naturally-derived insecticides before moving on to synthetic insecticides. Neem oil and pyrethrum are naturally-derived insecticides that should be applied following label instructions. Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
Soft rot
Soft rot causes the entire plant to turn black and rot from the inside out.
Solutions: Once soft rot appears, it is difficult to control. For minor issues of soft rot where only a small area is affected: Reduce watering. Only water when the soil is completely dry. Prune away affected tissue. Remove all dead and/or rotting roots and leaves. Use sterile tools. Repot using new soil. If potted, repot the plant with new soil. Be sure to use a pot with proper drainage holes. For severe cases when a large amount of tissue is infected or black: Dispose of plant. Severely infected plants will not recover. Dispose of the plant so that other nearby plants are not infected. Do not compost the infected plant.
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
- Wilted, droopy flowers
- Petals and leaves begin to wrinkle
- Brown papery streaks or spots appear on the petals and leaf tips
- Flowerhead shrink in size
- Petal color fades
- Yellowing leaves
- Complete death of the flower
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
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Leaf beetles
Leaf beetles are a class of colored insects 1 to 2 cm in size. They gnaw on leaves and petals resulting in small, round holes scattered over the surface.
Overview
Leaf beetles range in size from 1.5 mm to 2 cm. Both adult beetles and their larvae eat the leaves of many different types of plants. There are over 35,000 different species of leaf beetles, in a variety of colors including gold, green, yellow-striped, and red striped. Some of these have been mistaken for ladybirds because of their shape and coloring. They can be oval, round, or elongated in shape. These insect pests are most active in spring and summer.
If not controlled, leaf beetles can do a lot of damage to vegetable crops and ornamental plants. They feed on the leaves, flowers, stems, roots, and fruits of different plants. They can fly, which means it's easy for them to move from one plant to another. Some species of leaf beetles only target one specific crop, while others will target many different types of plants. Although a lot of the damage that they cause is cosmetic, an infestation can weaken a plant and leave it prone to other more problematic diseases.
Symptom Analysis
The first signs of a leaf beetles infestation are small visible holes in leaves. Leaves then become discolored and dark beetle droppings can be seen. As the leaves turn yellow and brown, they will drop off the plant onto the ground. Some leaves will appear skeletonized with only the veins still remaining.
Infestation begins in spring, when the adult beetles emerge from the soil and lay their eggs on the leaves of plants. When these eggs hatch, the young nymphs start munching on the leaves as they grow up. Once leaf beetles are large and mature, they'll fall to the ground and pupate in the soil over winter before starting the cycle all over again.
Leaf beetles also eat holes in fruits and vegetables. These can be seen as small round holes that sometimes have a larger brown area surrounding them.
Solutions
For less serious cases:
- Remove beetles, nymphs, and eggs. Remove all life stages of the beetles and kill them by placing them in a bucket of warm, soapy water. This can be done more easily by placing the bucket under affected leaves and shaking the plant. This method is most effective in the afternoon when leaf beetles are more active. Always dispose of insects in a sealed bag or container to avoid escape and spread.
To treat more serious infestations:
- Apply organic insecticides. Use naturally-derived insecticides before moving on to synthetic insecticides. Neem oil and pyrethrum are naturally-derived insecticides that should be applied following label instructions.
- Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
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
Soft rot
Soft rot causes the entire plant to turn black and rot from the inside out.
Overview
Soft rot is a common disease affecting mostly fruits and vegetables. It can occur while plants are growing but is more common once the produce has been harvested. The most susceptible plants are fleshy vegetables like tomatoes, lettuce, sweet potato, capsicum, bananas, eggplants, squash, cucumber, avocados, and potatoes.
Many succulents are also susceptible to soft rot. This is especially the case when the plant has received some damage, as bacteria enters the succulent through the open wound.
Symptom Analysis
Initially, the disease is spotted in the form of soft, wet, cream-to-tan necrotic spots. These may appear on fruits and vegetables, including tubers, or succulent leaves and stems. The spots are surrounded by a dark brown to black ring.
As the disease progresses, the plant part becomes infected with a soft and slimy rot that has a foul odor. A dark discoloration can be seen internally. Potatoes, sweet potatoes and other tubers will have evidence of this rot under the skin. Fruits like avocados exhibit a dark metallic sheen on the outside and the flesh is grey to black. The flesh also has a putrid odor.
Succulents with soft rot will have watery-looking scabs on the stems or leaves. As the disease progresses, the spots will turn brown to black and they may have a foul-smelling discharge. For succulents with shorter stems, it may be more difficult to notice the earliest symptoms, and soft rot may not be noticed until the plant has already begun rotting from the center.
Disease Cause
Soft rot is caused by the bacteria Erwinia cartovorum. This bacteria secretes enzymes that decompose the cell wall structure of the plant. This destroys the plant tissue and causes the plant or its fruit to rot.
The bacteria lives in crop debris as well as soil and water, including the ocean. It infects plants through open wounds, including those caused by overwatering in succulents. It is normally spread by splashing water, insects, and wind. Infection is worse in hot and humid weather.
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Distribution of Great masterwort
Feedback
Distribution Map of Great masterwort
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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About
Care Guide
More Info
Pests & Diseases
Distribution
Great masterwort
Astrantia maxima
Also known as: Hellebore-leaved masterwort
Astrantia maxima reaches on average 90 cm of height. The stem is erect and glabrous, with little branches and few leaves. The basal leaves have a long petiole 10 to 20 cm, 3 to 7 lobes and toothed segments. Size: 8 to 15 cm.
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Care Guide for Great masterwort
Feedback
Know the light your plants really get.
Find the best spots for them to optimize their health, simply using your phone.
Download the App for Free
Download
Key Facts About Great masterwort
Feedback
Attributes of Great masterwort
Lifespan
Perennial
Plant Type
Herb
Plant Height
50 cm
Spread
50 cm
Leaf Color
Green
Flower Color
Pink
Leaf type
Semi-evergreen
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Scientific Classification of Great masterwort
Phylum
Vascular plants Class
Dicotyledons Family
Umbellifers Genus
Masterworts Species
Great masterwort 
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Common Pests & Diseases About Great masterwort
Feedback
Common issues for Great masterwort based on 10 million real cases
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Learn More About the Flower withering ![more]()
Leaf beetles
Leaf beetles are a class of colored insects 1 to 2 cm in size. They gnaw on leaves and petals resulting in small, round holes scattered over the surface.
Solutions: For less serious cases: Remove beetles, nymphs, and eggs. Remove all life stages of the beetles and kill them by placing them in a bucket of warm, soapy water. This can be done more easily by placing the bucket under affected leaves and shaking the plant. This method is most effective in the afternoon when leaf beetles are more active. Always dispose of insects in a sealed bag or container to avoid escape and spread. To treat more serious infestations: Apply organic insecticides. Use naturally-derived insecticides before moving on to synthetic insecticides. Neem oil and pyrethrum are naturally-derived insecticides that should be applied following label instructions. Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
Learn More About the Leaf beetles ![more]()
Soft rot
Soft rot causes the entire plant to turn black and rot from the inside out.
Solutions: Once soft rot appears, it is difficult to control. For minor issues of soft rot where only a small area is affected: Reduce watering. Only water when the soil is completely dry. Prune away affected tissue. Remove all dead and/or rotting roots and leaves. Use sterile tools. Repot using new soil. If potted, repot the plant with new soil. Be sure to use a pot with proper drainage holes. For severe cases when a large amount of tissue is infected or black: Dispose of plant. Severely infected plants will not recover. Dispose of the plant so that other nearby plants are not infected. Do not compost the infected plant.
Learn More About the Soft rot ![more]()
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
- Wilted, droopy flowers
- Petals and leaves begin to wrinkle
- Brown papery streaks or spots appear on the petals and leaf tips
- Flowerhead shrink in size
- Petal color fades
- Yellowing leaves
- Complete death of the flower
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
Solutions
If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface.
In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well.
If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Prevention
This is definitely one of those instances where prevention is more effective than cure. Here are some preventative measures for avoiding premature flower withering.
- Water plants according to their needs -- either keep the soil slightly moist or allow the top inch or two to dry out before watering again.
- Fertilize lightly on a consistent basis, depending upon the plant’s growth. Quick-growing plants and those that flower or develop fruit will need more frequent fertilizing than slow-growing plants.
- Purchase plants that are certified disease- or pathogen-free.
- Look for disease-resistant cultivars.
- Isolate plants showing disease symptoms to prevent the spread to neighboring plants.
- Practice good plant hygiene by removing any fallen plant material as soon as possible.
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Leaf beetles
Leaf beetles are a class of colored insects 1 to 2 cm in size. They gnaw on leaves and petals resulting in small, round holes scattered over the surface.
Overview
Leaf beetles range in size from 1.5 mm to 2 cm. Both adult beetles and their larvae eat the leaves of many different types of plants. There are over 35,000 different species of leaf beetles, in a variety of colors including gold, green, yellow-striped, and red striped. Some of these have been mistaken for ladybirds because of their shape and coloring. They can be oval, round, or elongated in shape. These insect pests are most active in spring and summer.
If not controlled, leaf beetles can do a lot of damage to vegetable crops and ornamental plants. They feed on the leaves, flowers, stems, roots, and fruits of different plants. They can fly, which means it's easy for them to move from one plant to another. Some species of leaf beetles only target one specific crop, while others will target many different types of plants. Although a lot of the damage that they cause is cosmetic, an infestation can weaken a plant and leave it prone to other more problematic diseases.
Symptom Analysis
The first signs of a leaf beetles infestation are small visible holes in leaves. Leaves then become discolored and dark beetle droppings can be seen. As the leaves turn yellow and brown, they will drop off the plant onto the ground. Some leaves will appear skeletonized with only the veins still remaining.
Infestation begins in spring, when the adult beetles emerge from the soil and lay their eggs on the leaves of plants. When these eggs hatch, the young nymphs start munching on the leaves as they grow up. Once leaf beetles are large and mature, they'll fall to the ground and pupate in the soil over winter before starting the cycle all over again.
Leaf beetles also eat holes in fruits and vegetables. These can be seen as small round holes that sometimes have a larger brown area surrounding them.
Solutions
For less serious cases:
- Remove beetles, nymphs, and eggs. Remove all life stages of the beetles and kill them by placing them in a bucket of warm, soapy water. This can be done more easily by placing the bucket under affected leaves and shaking the plant. This method is most effective in the afternoon when leaf beetles are more active. Always dispose of insects in a sealed bag or container to avoid escape and spread.
To treat more serious infestations:
- Apply organic insecticides. Use naturally-derived insecticides before moving on to synthetic insecticides. Neem oil and pyrethrum are naturally-derived insecticides that should be applied following label instructions.
- Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
Prevention
To prevent infestations of leaf beetles, follow these practices.
- Regularly check for beetles. To prevent large pest infestations, be proactive about frequently checking plants for pests and removing them quickly.
- Clear debris. Clear weeds and debris to remove areas where these beetles may overwinter and hide.
- Attract natural predators. Birds and other insects, such as wasps and ladybugs, are effective natural predators of leaf beetles. Encourage them to visit by including a diverse array of plants to provide habitat and food. Also, avoid applying broad-spectrum herbicides that can harm and kill beneficial insects.
- Plant aromatic herbs like mint, garlic, or rosemary, as these can repel leaf beetles.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Soft rot
Soft rot causes the entire plant to turn black and rot from the inside out.
Overview
Soft rot is a common disease affecting mostly fruits and vegetables. It can occur while plants are growing but is more common once the produce has been harvested. The most susceptible plants are fleshy vegetables like tomatoes, lettuce, sweet potato, capsicum, bananas, eggplants, squash, cucumber, avocados, and potatoes.
Many succulents are also susceptible to soft rot. This is especially the case when the plant has received some damage, as bacteria enters the succulent through the open wound.
Symptom Analysis
Initially, the disease is spotted in the form of soft, wet, cream-to-tan necrotic spots. These may appear on fruits and vegetables, including tubers, or succulent leaves and stems. The spots are surrounded by a dark brown to black ring.
As the disease progresses, the plant part becomes infected with a soft and slimy rot that has a foul odor. A dark discoloration can be seen internally. Potatoes, sweet potatoes and other tubers will have evidence of this rot under the skin. Fruits like avocados exhibit a dark metallic sheen on the outside and the flesh is grey to black. The flesh also has a putrid odor.
Succulents with soft rot will have watery-looking scabs on the stems or leaves. As the disease progresses, the spots will turn brown to black and they may have a foul-smelling discharge. For succulents with shorter stems, it may be more difficult to notice the earliest symptoms, and soft rot may not be noticed until the plant has already begun rotting from the center.
Disease Cause
Soft rot is caused by the bacteria Erwinia cartovorum. This bacteria secretes enzymes that decompose the cell wall structure of the plant. This destroys the plant tissue and causes the plant or its fruit to rot.
The bacteria lives in crop debris as well as soil and water, including the ocean. It infects plants through open wounds, including those caused by overwatering in succulents. It is normally spread by splashing water, insects, and wind. Infection is worse in hot and humid weather.
Solutions
Once soft rot appears, it is difficult to control.
For minor issues of soft rot where only a small area is affected:
- Reduce watering. Only water when the soil is completely dry.
- Prune away affected tissue. Remove all dead and/or rotting roots and leaves. Use sterile tools.
- Repot using new soil. If potted, repot the plant with new soil. Be sure to use a pot with proper drainage holes.
For severe cases when a large amount of tissue is infected or black:
- Dispose of plant. Severely infected plants will not recover. Dispose of the plant so that other nearby plants are not infected. Do not compost the infected plant.
Prevention
To prevent soft rot, do the following:
- Avoid overwatering. Only water succulents when soil is almost dry. Make sure potted plants are in containers with drainage holes.
- Ensure proper airflow. Do not crowd plants together. Make sure there is adequate space between plants to allow for airflow.
- Source healthy plants. Avoid introducing plants with soft rot into your garden or home. Buy plants for a reliable source and check for signs of soft rot.
- Sterilize pruning tools. Soft rot bacteria enter plants where tissue is cut. Make sure to sterilize pruning tools before using.
- Control pests. Pests can spread soft rot bacteria when they feed on plants. Controlling pests will help stop the spread of soft rot.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Treat and prevent plant diseases.
AI-powered plant doctor helps you diagnose plant problems in seconds.
Download the App for Free
Distribution of Great masterwort
Feedback
Distribution Map of Great masterwort
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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...
