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Olympic mullein
Olympic mullein
Olympic mullein
Verbascum olympicum
Also known as : Olympian mullein
Hardiness Zones
Hardiness Zones
5 to 9
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Care Guide for Olympic mullein

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Soil Care
Soil Care
Sand, Clay, Neutral, Alkaline
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Full sun
Details on Sunlight Requirements Ideal Lighting
Ideal Temperature
Ideal Temperature
5 to 9
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Olympic mullein
Sunlight
Sunlight
Full sun
Hardiness Zones
Hardiness Zones
5 to 9
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Questions About Olympic mullein

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
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What is the best way to water my Olympic mullein?
When watering the Olympic mullein, 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 Olympic mullein comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
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What should I do if I water my Olympic mullein too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Olympic mullein, 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 Olympic mullein, 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 Olympic mullein have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Olympic mullein. 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 Olympic mullein 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 Olympic mullein 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 Olympic mullein?
If your plant is in a pot. The most precise way to decide whether your Olympic mullein 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 Olympic mullein 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 Olympic mullein can show an admirable ability to withstand drought.
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How much water does my Olympic mullein need?
When it comes time to water your Olympic mullein, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
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How should I water my Olympic mullein at different growth stages?
The water needs of the Olympic mullein can change depending on growth stages as well. For example, when your Olympic mullein 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 Olympic mullein 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 Olympic mullein 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 Olympic mullein more water at this time.
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How should I water my Olympic mullein through the seasons?
The Olympic mullein 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 Olympic mullein will contract a disease.
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What's the difference between watering my Olympic mullein indoors and outdoors?
It is most common to grow the Olympic mullein 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 Olympic mullein 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 Olympic mullein 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 Olympic mullein

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Attributes of Olympic mullein

Lifespan
Perennial, Biennial
Plant Type
Herb
Bloom Time
Summer, Early fall
Plant Height
2 m
Spread
60 cm
Leaf Color
Silver
Green
Gray
Flower Color
Yellow
Stem Color
Green
Gray
Silver
Yellow
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃

Scientific Classification of Olympic mullein

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Common Pests & Diseases About Olympic mullein

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Common issues for Olympic mullein based on 10 million real cases
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Leaf rot
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
Leaf beetles
Leaf beetles Leaf beetles
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.
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.
Wilting after blooming
Wilting after blooming Wilting after blooming
Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Olympic mullein?
What is Leaf rot Disease on Olympic mullein?
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
Symptom Analysis
Symptom Analysis
On Olympic mullein, leaf rot manifests as dark, water-soaked lesions on leaves, yellowing or browning foliage, and eventual leaf drop. Severely affected plants may exhibit stunted growth.
What Causes Leaf rot Disease on Olympic mullein?
What Causes Leaf rot Disease on Olympic mullein?
1
Fungi
Specifically, fungi from the Phytophthora or Pythium genera, thriving in moist environments, infiltrate the plant tissues, causing decay.
2
Environmental Conditions
Overly damp conditions, poor soil drainage, and high humidity facilitate the proliferation and spread of the fungus.
How to Treat Leaf rot Disease on Olympic mullein?
How to Treat Leaf rot Disease on Olympic mullein?
1
Non pesticide
Improving Drainage: Enhance soil drainage to prevent water accumulation around the plant roots.

Removing Infected Parts: Prune and dispose of infected plant parts to reduce spread of the disease.
2
Pesticide
Fungicidal Sprays: Apply approved fungicides targeting Phytophthora and Pythium species as a preventive measure or at disease onset.
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Leaf beetles
plant poor
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
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
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
Solutions
For less serious cases:
  1. 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:
  1. 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.
  2. Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
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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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Wilting after blooming
plant poor
Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
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distribution

Distribution of Olympic mullein

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Distribution Map of Olympic mullein

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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More Info on Olympic Mullein Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Transplant
2-3 feet
The prime time to transplant olympic mullein is between mid-spring and early summer, embracing the vigorous growth phase. Choose a sunny spot with well-draining soil. For success, ensure root establishment before high heat arrives. Gentle handling is key.
Transplant Techniques
Leaf rot
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
Read More
Spider mite
Spider mite infestation in Olympic mullein causes mottled yellow foliage and stunted growth, leading to compromised health and vitality. This pest typically flourishes in warm, dry conditions affecting both yield and aesthetics of Olympic mullein.
Read More
Aphid
The disease 'Aphid' heavily impacts Olympic mullein, causing significant damage to its growth and health. Aphids feed on sap, leading to stunted growth, deformed leaves, and sometimes plant death.
Read More
Scale insect
Scale insects are sap-sucking pests causing stunted growth and yellowing in Olympic mullein. Though slow to spread, if untreated, they can significantly weaken the plant and lead to growth deformities.
Read More
Leaf beetle
Leaf beetles are destructive pests causing widespread defoliation in 'Olympic mullein'. The beetles eat leaves, leading to decreased photosynthesis, stunted growth, and potentially, plant death.
Read More
Dodder
Dodder is a parasitic plant that affects Olympic mullein, leading to stunted growth and weakened health. This parasite attaches to the host, extracting nutrients and disrupting its normal functions.
Read More
Flower wilting
Flower wilting in Olympic mullein primarily results from inadequate water management, severe pathogen attacks, or environmental stress, leading to drooping and premature death of flowers and foliage.
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Caterpillar
The 'Caterpillar' primarily damages the foliage of Olympic mullein, affecting photosynthesis and overall vitality. This disease causes noticeable defoliation, stunted growth, and can severely impact plant health if unmanaged.
Read More
Mealybug
Mealybug disease harms Olympic mullein by sapping nutrients, leading to stunted growth and yellowing leaves. Without intervention, it can be fatal.
Read More
Leaf wilting
Leaf wilting in Olympic mullein is a physiological disorder, primarily caused by inadequate water supply or root disease, leading to drooping and discoloration of leaves and potentially stunting the plant's growth if unmanaged.
Read More
Leafhopper
Leafhopper disease in Olympic mullein involves infestation by leafhopper insects leading to discoloration and stunted growth. It impacts the plant's health severely by transmitting the phytoplasma that causes the disease.
Read More
Flower withering
Flower withering impacts the growth and bloom of Olympic mullein significantly. Typically resulting from certain pathogens or environmental stressors, the disease notably diminishes the aesthetic and health of the plants.
Read More
Thrips
Thrips are tiny pests causing significant damage to 'Olympic mullein'. These insects feed on the plant's sap, leading to discolored and deformed foliage, severely affecting plant vigor and aesthetics.
Read More
Dark blotch
Dark blotch is a fungal disease that severely affects Olympic mullein, causing discoloration and reduced vitality. Outbreaks typically occur in late spring through moist conditions, leading to loss of aesthetic and functional value of the plant.
Read More
Weevil
Weevil disease primarily impacts Olympic mullein by inhibiting growth and causing visible damage to leaves and stems. The disease severity can vary depending on environmental conditions and plant health.
Read More
Whitefly
Whitefly is a pest prevalent on Olympic mullein, causing yellowing leaves, stunted growth, and honeydew deposits which lead to sooty mold. This infestation can severely impact plant health and aesthetics.
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Feng shui direction
Northeast
The olympic mullein is often found conducive to a harmonious Feng Shui environment. The tall stature is considered to channel upward energy, promoting growth and prosperity. When placed in the Northeast direction, it tends to enhance knowledge and wisdom, as this direction is associated with the Earth element in classical Feng Shui where olympic mullein's earthy and sturdy features correspond well.
Fengshui Details
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Plants Related to Olympic mullein

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Western blue-eyed grass
Western blue-eyed grass
Western blue-eyed grass is a perennial flowering grass native to California. It reseeds easily and can also be grown from rhizomes. This plant grows small purple-blue flowers and is summer-drought tolerant, making it a nice choice for border edges and tree lines.
West indian pinkroot
West indian pinkroot
You can expect to see west indian pinkroot in ornamental gardens because of its showy flowers, which bloom in mid-summer, with red exteriors and cream-colored interiors. The plant is poisonous. This plant grows in the wild at locations such as wasteland, rice fields, and riverbanks at altitudes up to 600 meters.
Weather prophet
Weather prophet
Weather prophet (Dimorphotheca pluvialis) is an annual flower native to South Africa, although it was introduced to and has become naturalized in parts of the western United States. Blooms are generally white and may have purple or blue markings.
Waxflower shinleaf
Waxflower shinleaf
The waxflower shinleaf is a green and white flowering plant that is part of the heath family. It gets its nickname "waxflower shinleaf" from the shiny, waxy texture of its leaves. The leaves have been used in Native American folk medicines, but no modern clinical studies have confirmed any medicinal properties.
Waterlily sugarbush
Waterlily sugarbush
Waterlily sugarbush is native to South Africa's fynbos biome. Its unusual blooms resemble waterlilies, with white to pink petals adorned with greenish-brown bracts, and attract bees and birds. The colorful flowers are often used in floral arrangements and gardens.
Virginia marsh St. John's wort
Virginia marsh St. John's wort
Virginia marsh St. John's wort (Triadenum virginicum) is a small flowering plant from central and eastern North America. It grows in bogs, wet meadows, fens, marshes, and other damp soil types. The flowers bloom in summer and, in contrast to the yellow flowers of most St. Johns wort species, come in as pink or red.
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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Olympic mullein
Olympic mullein
Olympic mullein
Verbascum olympicum
Also known as: Olympian mullein
Hardiness Zones
Hardiness Zones
5 to 9
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Care Guide for Olympic mullein

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Questions About Olympic mullein

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

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Attributes of Olympic mullein

Lifespan
Perennial, Biennial
Plant Type
Herb
Bloom Time
Summer, Early fall
Plant Height
2 m
Spread
60 cm
Leaf Color
Silver
Green
Gray
Flower Color
Yellow
Stem Color
Green
Gray
Silver
Yellow
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃
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Scientific Classification of Olympic mullein

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Common Pests & Diseases About Olympic mullein

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Common issues for Olympic mullein based on 10 million real cases
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Leaf rot
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
Learn More About the Leaf rot more
Leaf beetles
Leaf beetles Leaf beetles 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
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
Wilting after blooming
Wilting after blooming Wilting after blooming Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Olympic mullein?
What is Leaf rot Disease on Olympic mullein?
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
Symptom Analysis
Symptom Analysis
On Olympic mullein, leaf rot manifests as dark, water-soaked lesions on leaves, yellowing or browning foliage, and eventual leaf drop. Severely affected plants may exhibit stunted growth.
What Causes Leaf rot Disease on Olympic mullein?
What Causes Leaf rot Disease on Olympic mullein?
1
Fungi
Specifically, fungi from the Phytophthora or Pythium genera, thriving in moist environments, infiltrate the plant tissues, causing decay.
2
Environmental Conditions
Overly damp conditions, poor soil drainage, and high humidity facilitate the proliferation and spread of the fungus.
How to Treat Leaf rot Disease on Olympic mullein?
How to Treat Leaf rot Disease on Olympic mullein?
1
Non pesticide
Improving Drainage: Enhance soil drainage to prevent water accumulation around the plant roots.

Removing Infected Parts: Prune and dispose of infected plant parts to reduce spread of the disease.
2
Pesticide
Fungicidal Sprays: Apply approved fungicides targeting Phytophthora and Pythium species as a preventive measure or at disease onset.
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Leaf beetles
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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
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
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
Solutions
For less serious cases:
  1. 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:
  1. 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.
  2. Apply synthetic insecticides. Examples of insecticides effective for leaf beetles include carbaryl, permethrin, and bifenthrin. Apply insecticides according to label instructions.
Prevention
Prevention
To prevent infestations of leaf beetles, follow these practices.
  1. Regularly check for beetles. To prevent large pest infestations, be proactive about frequently checking plants for pests and removing them quickly.
  2. Clear debris. Clear weeds and debris to remove areas where these beetles may overwinter and hide.
  3. 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.
  4. Plant aromatic herbs like mint, garlic, or rosemary, as these can repel leaf beetles.
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Aged yellow and dry
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Aged yellow and dry
Natural aging can cause leaves to turn yellow and dry out.
Overview
Overview
Regardless of the type of plant or where it is grown, at some point, it will begin to aged yellow and dry. This is a natural, unavoidable process that happens when the plant has completed all of the steps in its life.
Annual plants go through this process at the end of a single growing season. Perennial plants live for multiple years, if not tens or hundreds of years, but will still ultimately exhibit these symptoms.
Symptom Analysis
Symptom Analysis
When plants have progressed through their natural developmental stages and are nearing the end of their lifecycle, they begin showing signs of decline. Leaves will start to yellow and droop, and over time they turn papery brown and dry.
Once completely dry, the leaves begin to fall from the plant until the entire plant has dried out.
Disease Cause
Disease Cause
At the end of its life, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence or natural aging and death. Cell division stops, and the plant begins catabolizing resources to use in other parts of the plant.
As this happens, the tissues begin yellow and drying until the entire plant is desiccated and perishes.
Solutions
Solutions
If the yellowing and drying of leaves and flowers is a natural progression due to age, nothing can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
Prevention
Prevention
Unfortunately, there is no way to prevent plants from dying of “old age.” To help prolong their life, and put off symptoms of aged yellow and dry for as long as possible, take care of them by giving them enough water, fertilizing them appropriately, and making sure they get enough sunlight.
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Wilting after blooming
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Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
Solutions
Solutions
  • Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water.
  • Water according to recommendations for each plant's species.
  • Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too.
  • Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants.
  • Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Prevention
Prevention
  • Read up on moisture, light, and soil type preferences for each plant to avoid underwatering, incorrect light levels, or other conditions that can cause wilting blooms.
  • Avoid re-potting during the flowering period. This causes additional stress on the plants because they need to repair root damage and adapt to the new micro-environment, all of which can result in wilting.
  • One other potential cause is ethylene gas, a plant hormone related to ripening. Some fruits and vegetables emit ethylene, especially bananas. Apples, grapes, melons, avocados, and potatoes can also give it off, so keep flowering plants away from fresh produce.
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distribution

Distribution of Olympic mullein

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Distribution Map of Olympic mullein

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
care_scenes

More Info on Olympic Mullein Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Leaf rot
Leaf rot predominantly damages the photosynthetic capacity of Olympic mullein, leading to diminished growth and potential plant death if untreated. It occurs due to fungal infection, exacerbated by wet conditions.
 detail
Spider mite
Spider mite infestation in Olympic mullein causes mottled yellow foliage and stunted growth, leading to compromised health and vitality. This pest typically flourishes in warm, dry conditions affecting both yield and aesthetics of Olympic mullein.
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Aphid
The disease 'Aphid' heavily impacts Olympic mullein, causing significant damage to its growth and health. Aphids feed on sap, leading to stunted growth, deformed leaves, and sometimes plant death.
 detail
Scale insect
Scale insects are sap-sucking pests causing stunted growth and yellowing in Olympic mullein. Though slow to spread, if untreated, they can significantly weaken the plant and lead to growth deformities.
 detail
Leaf beetle
Leaf beetles are destructive pests causing widespread defoliation in 'Olympic mullein'. The beetles eat leaves, leading to decreased photosynthesis, stunted growth, and potentially, plant death.
 detail
Dodder
Dodder is a parasitic plant that affects Olympic mullein, leading to stunted growth and weakened health. This parasite attaches to the host, extracting nutrients and disrupting its normal functions.
 detail
Flower wilting
Flower wilting in Olympic mullein primarily results from inadequate water management, severe pathogen attacks, or environmental stress, leading to drooping and premature death of flowers and foliage.
 detail
Caterpillar
The 'Caterpillar' primarily damages the foliage of Olympic mullein, affecting photosynthesis and overall vitality. This disease causes noticeable defoliation, stunted growth, and can severely impact plant health if unmanaged.
 detail
Mealybug
Mealybug disease harms Olympic mullein by sapping nutrients, leading to stunted growth and yellowing leaves. Without intervention, it can be fatal.
 detail
Leaf wilting
Leaf wilting in Olympic mullein is a physiological disorder, primarily caused by inadequate water supply or root disease, leading to drooping and discoloration of leaves and potentially stunting the plant's growth if unmanaged.
 detail
Leafhopper
Leafhopper disease in Olympic mullein involves infestation by leafhopper insects leading to discoloration and stunted growth. It impacts the plant's health severely by transmitting the phytoplasma that causes the disease.
 detail
Flower withering
Flower withering impacts the growth and bloom of Olympic mullein significantly. Typically resulting from certain pathogens or environmental stressors, the disease notably diminishes the aesthetic and health of the plants.
 detail
Thrips
Thrips are tiny pests causing significant damage to 'Olympic mullein'. These insects feed on the plant's sap, leading to discolored and deformed foliage, severely affecting plant vigor and aesthetics.
 detail
Dark blotch
Dark blotch is a fungal disease that severely affects Olympic mullein, causing discoloration and reduced vitality. Outbreaks typically occur in late spring through moist conditions, leading to loss of aesthetic and functional value of the plant.
 detail
Weevil
Weevil disease primarily impacts Olympic mullein by inhibiting growth and causing visible damage to leaves and stems. The disease severity can vary depending on environmental conditions and plant health.
 detail
Whitefly
Whitefly is a pest prevalent on Olympic mullein, causing yellowing leaves, stunted growth, and honeydew deposits which lead to sooty mold. This infestation can severely impact plant health and aesthetics.
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