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Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Cirsium discolor
The Cirsium discolor is an American natives biennial or perennial herb that reaches up to 2 m tall. The field thistle's flowers are large and showy, which produce a good amount of nectar and pollens. It is an important food source of bees and butterflies. The young leaves and stems can be boiled and served as edible greens.
Hardiness Zones
Hardiness Zones
2 to 9
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Weeds
plant_info

Key Facts About Field thistle

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Attributes of Field thistle

Lifespan
Perennial, Biennial
Plant Type
Herb
Planting Time
Spring
Bloom Time
Summer, Early fall
Harvest Time
Early fall, Mid fall
Plant Height
91 cm to 2 m
Spread
30 cm
Leaf Color
Green
White
Flower Size
2.5 cm to 5 cm
Flower Color
Pink
Purple
White
Red
Fruit Color
Brown
Stem Color
Green
White
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃
Pollinators
Beetles, Wasps, Flies, Moths, Butterflies, Hummingbirds
Benefits to Pollinating Insects
Adult food, Larval food

Symbolism

Strength, Protection, Hex Breaking

Scientific Classification of Field thistle

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weed

Weed Control About Field thistle

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Weeds
Field thistle is native to North America. In the states of Arkansas and Iowa, it is considered a noxious weed as it is extremely poisonous. Despite this, the weed is rarely consumed by grazing animals, but care should be taken when handling the plant as contact may result in dermatitis. Another problem with this weed is that it inhibits the growth of neighboring plants, thereby frustrating any efforts to grow or conserve other species. Field thistle can be removed through the application of chemical herbicides.
How to Control it
Once weeds are flowering and firm, it is difficult to effectively control them, so the best time for weeds to be removed is before flowering and firming; once flowering and firming, the seeds will spread very quickly and need to be removed frequently, and prevention should be made in the next year. Seed stage: It can be covered with sawdust, crop straw or black opaque film, which can effectively inhibit seed germination and weed seedling growth. This method is generally used in winter or spring to inhibit weed seeds from germinating in the soil; if weeds are already flowering and firm, this method can be used to isolate the seeds from the soil and reduce the number of seeds that fall into the soil. Unplugging: Before weeds are strong, wear gloves or use tools to dig out weeds. If the soil is difficult to remove due to drought, it can be used to thoroughly remove the roots of weeds after being irrigated with water. After removal, it can be used in conjunction with deep cultivation to prevent weed roots from remaining. This method is particularly suitable for weeds at the seedling stage or with a relatively low size. Pruning: Pruning before weeds can effectively control the spread of weeds, especially for annual weeds. Frequent pruning can suppress the growth and fruiting of weeds, which can effectively remove weeds that year. Tillage: Tillage the soil before cultivation, pick up and discard perennial weed roots, expose to the sun, or bury it deeply. It can also be used to make organic fertilizer and compost with weeds. Chemical control: The weeds can be effectively removed by competing herbicides. Note: When removing weeds, you need to wear gloves to avoid direct contact between the body and the weeds, especially for some toxic, thorny, sensitive mucous weeds. When cleaning weeds during flowering, you need to wear a special mask to prevent allergies caused by inhaling pollen.
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distribution

Distribution of Field thistle

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Habitat of Field thistle

Damp areas in forest openings, prairies, disturbed sites
Northern Hemisphere
South Hemisphere

Distribution Map of Field thistle

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
habit
question

Questions About Field thistle

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

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Lighting
Full sun
Field thistle thrives best under generous exposure to the sun's rays, though it can tolerate lower levels of light and also conditions where sunlight is scarce. Diverse sunlight conditions of its uncultivated habitats allows it to grow healthily. Excessive or lacking light can impair its growth and vitality.
Best Sunlight Practices
Temperature
0 - 38 ℃
Field thistle is a plant accustomed to temperatures ranging from 68 to 95 °F (20 to 35 °C). Being native to environments with moderate climates, it thrives under warm conditions. Extreme temperatures can be detrimental and seasonal adjustments may be required to maintain optimal growth.
Temp for Healthy Growth
Transplant
2-3 feet
The ideal season for transplanting field thistle is during the cooler months of S1 for the healthiest root development. Ensure you choose an open, sunny location, rich in organic matter. Be sure not to crowd field thistle, this helps prevent fungal issues. Remember, correct preparation equals better success!
Transplant Techniques
Feng shui direction
Northwest
The field thistle has unique Feng Shui compatibility for those open to experiencing its subtle energies. Particularly suited to Northwest-facing positions, it might attract beneficial chi when positioned correctly. Some experts suggest its thorny appearance helps deflect unwanted negative energy, yet this remains open to personal interpretation. Remember, Feng Shui is subjective, bearing meaning only to the giver and receiver.
Fengshui Details
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Plants Related to Field thistle

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Pale Meadow Beauty
Pale Meadow Beauty
Pale Meadow Beauty (Rhexia mariana) is a perennial flowering herb native to the eastern and midwestern United States. Pale Meadow Beauty is used in landscaping and is often planted along roadsides.
Creeping groundsel
Creeping groundsel
Creeping groundsel (Senecio angulatus) is a twining vine that can grow to 6 m long. Large leaves are pale green and glossy. It will grow low as a shrub or grow as a vine along a trellis, fence or garden wall. Blooms in spring with clusters of bright yellow, daisy-like flowers. It can be invasive, climbing into trees and smothering smaller plants and shrubs.
Barbados nut
Barbados nut
The barbados nut (Jatropha curcas) plant is cultivated throughout the world for ornamental uses because of its rapid growth. Since cattle will not consume the leaves, it works very well as a living fence around grazing areas. Oil is extracted from the nuts and used as a torch fuel and burns so well that the fires are not affected by strong winds!
Camphorweed
Camphorweed
Camphorweed (Heterotheca subaxillaris) is a fragrant herbaceous perennial plant native to North America and Mexico. The aromatic camphor smell of this plant comes from internal chemicals and gives the plant its name.
Hyssop-leaf sandmat
Hyssop-leaf sandmat
Hyssop-leaf sandmat (Euphorbia hyssopifolia) is a sandmat that’s indigenous to the southwestern part of the United States. A sandmat is a plant in the genus of Euphorbia that thrives best in deserts. Hyssop-leaf sandmat has a milk-white sap in its stem—just like the milkweed. It’s also known as hyssop spurge, eyebane, wart weed, and chicken weed.
Pussyfoot
Pussyfoot
Praxelis clematidea is native to South America but has been introduced elsewhere in the world and is now considered an invasive weed in Australia and North America. Because it produces many small seeds which are capable of floating on the wind or becoming attached to passing animals, pussyfoot has been able to prolifically propagate itself.
Poison ivy
Poison ivy
In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.
Pokeweed
Pokeweed
Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.
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Weed Control
Distribution
Care FAQ
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Related Plants
Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Field thistle
Cirsium discolor
The Cirsium discolor is an American natives biennial or perennial herb that reaches up to 2 m tall. The field thistle's flowers are large and showy, which produce a good amount of nectar and pollens. It is an important food source of bees and butterflies. The young leaves and stems can be boiled and served as edible greens.
Hardiness Zones
Hardiness Zones
2 to 9
more
Weeds
plant_info

Key Facts About Field thistle

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Feedback
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Attributes of Field thistle

Lifespan
Perennial, Biennial
Plant Type
Herb
Planting Time
Spring
Bloom Time
Summer, Early fall
Harvest Time
Early fall, Mid fall
Plant Height
91 cm to 2 m
Spread
30 cm
Leaf Color
Green
White
Flower Size
2.5 cm to 5 cm
Flower Color
Pink
Purple
White
Red
Fruit Color
Brown
Stem Color
Green
White
Dormancy
Winter dormancy
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃
Pollinators
Beetles, Wasps, Flies, Moths, Butterflies, Hummingbirds
Benefits to Pollinating Insects
Adult food, Larval food
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Symbolism

Strength, Protection, Hex Breaking

Scientific Classification of Field thistle

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weed

Weed Control About Field thistle

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weed
Weeds
Field thistle is native to North America. In the states of Arkansas and Iowa, it is considered a noxious weed as it is extremely poisonous. Despite this, the weed is rarely consumed by grazing animals, but care should be taken when handling the plant as contact may result in dermatitis. Another problem with this weed is that it inhibits the growth of neighboring plants, thereby frustrating any efforts to grow or conserve other species. Field thistle can be removed through the application of chemical herbicides.
How to Control it
Once weeds are flowering and firm, it is difficult to effectively control them, so the best time for weeds to be removed is before flowering and firming; once flowering and firming, the seeds will spread very quickly and need to be removed frequently, and prevention should be made in the next year. Seed stage: It can be covered with sawdust, crop straw or black opaque film, which can effectively inhibit seed germination and weed seedling growth. This method is generally used in winter or spring to inhibit weed seeds from germinating in the soil; if weeds are already flowering and firm, this method can be used to isolate the seeds from the soil and reduce the number of seeds that fall into the soil. Unplugging: Before weeds are strong, wear gloves or use tools to dig out weeds. If the soil is difficult to remove due to drought, it can be used to thoroughly remove the roots of weeds after being irrigated with water. After removal, it can be used in conjunction with deep cultivation to prevent weed roots from remaining. This method is particularly suitable for weeds at the seedling stage or with a relatively low size. Pruning: Pruning before weeds can effectively control the spread of weeds, especially for annual weeds. Frequent pruning can suppress the growth and fruiting of weeds, which can effectively remove weeds that year. Tillage: Tillage the soil before cultivation, pick up and discard perennial weed roots, expose to the sun, or bury it deeply. It can also be used to make organic fertilizer and compost with weeds. Chemical control: The weeds can be effectively removed by competing herbicides. Note: When removing weeds, you need to wear gloves to avoid direct contact between the body and the weeds, especially for some toxic, thorny, sensitive mucous weeds. When cleaning weeds during flowering, you need to wear a special mask to prevent allergies caused by inhaling pollen.
Show More more
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distribution

Distribution of Field thistle

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Feedback
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Habitat of Field thistle

Damp areas in forest openings, prairies, disturbed sites
Northern Hemisphere
South Hemisphere

Distribution Map of Field thistle

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
question

Questions About Field thistle

feedback
Feedback
feedback
Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Field thistle?
more
What should I do if I water my Field thistle too much or too little?
more
How often should I water my Field thistle?
more
How much water does my Field thistle need?
more
How should I water my Field thistle at different growth stages?
more
How should I water my Field thistle through the seasons?
more
What's the difference between watering my Field thistle indoors and outdoors?
more
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Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
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More Info on Field Thistle Growth and Care

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Basic Care Guide
Explore More
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Plants Related to Field thistle

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Feedback
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Lighting
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Indoor
Indoor
Outdoor
Choose a site here for personalized care tips.
Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun, Full shade
Tolerance
About 3-6 hours sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
Field thistle thrives best under generous exposure to the sun's rays, though it can tolerate lower levels of light and also conditions where sunlight is scarce. Diverse sunlight conditions of its uncultivated habitats allows it to grow healthily. Excessive or lacking light can impair its growth and vitality.
Preferred
Tolerable
Unsuitable
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
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Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Field thistle thrives in full sunlight and is commonly grown outdoors where it receives ample sunlight. When placed in rooms with inadequate lighting, symptoms of light deficiency may not be readily apparent.
View more
(Symptom details and solutions)
Small leaves
New leaves may grow smaller in size compared to the previous ones once they have matured.
Leggy or sparse growth
The spaces between leaves or stems of your field thistle may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Slower or no new growth
Field thistle enters a survival mode when light conditions are poor, which leads to a halt in leaf production. As a result, the plant's growth becomes delayed or stops altogether.
Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
Solutions
1. To ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Field thistle thrives in full sun exposure and can tolerate intense sunlight. With their remarkable resilience, symptoms of sunburn may not be easily visible, as they rarely suffer from it.
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(Symptom details and solutions)
Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
Discover information about plant diseases, toxicity, weed control and more.
Temperature
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Indoor
Indoor
Outdoor
Choose a site here for personalized care tips.
Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
Field thistle is a plant accustomed to temperatures ranging from 68 to 95 °F (20 to 35 °C). Being native to environments with moderate climates, it thrives under warm conditions. Extreme temperatures can be detrimental and seasonal adjustments may be required to maintain optimal growth.
Regional wintering strategies
Field thistle has strong cold resistance, so special frost protection measures are usually not necessary during winter. However, if the winter temperatures are expected to drop below {Limit_growth_temperature}, it is still important to provide cold protection. This can be achieved by covering the plant with materials such as soil or straw. Before the first freeze in autumn, it is recommended to water the plant abundantly, ensuring the soil remains moist and enters a frozen state. This helps prevent drought and water scarcity for the plant during winter and early spring.
Important Symptoms
Symptoms of Low Temperature in Field thistle
Field thistle is cold-tolerant and thrives best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, although there may not be any noticeable changes during winter, there may be a decrease in sprouting or even no sprouting during springtime.
Solutions
In spring, remove any parts that have failed to sprout.
Symptoms of High Temperature in Field thistle
During summer, Field thistle should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the leaves of the plant may become lighter in color, prone to curling, susceptible to sunburn, and in severe cases, the entire plant may wilt and become dry.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun, or use a shade cloth to create shade. Water the plant in the morning and evening to keep the soil moist.
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Cookie Name
_fbp
Source
Facebook Pixel
Purpose
A conversion pixel tracking that we use for retargeting campaigns. Learn more here.
Lifespan
1 Year

Cookie Name
_adj
Source
Adjust
Purpose
This cookie provides mobile analytics and attribution services that enable us to measure and analyze the effectiveness of marketing campaigns, certain events and actions within the Application. Learn more here.
Lifespan
1 Year
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