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Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i
Horrid thistle (Cirsium horridulum)-i

Horrid thistle

Scientific name
Cirsium horridulum

Basic Information

Asteraceae Family Cirsium Genus Horrid thistle Species
Asteraceae > Cirsium > Cirsium horridulum
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  • Forb/herb
  • Perennial
Height
100cm ~ 200cm
Flower Color
Leaf Color
Anthesis
spring, summer
Sunlight Exposure
Full Sun
Hardiness Zones
5-9
Cold resistance
Good
Heat resistance
Good
Habitat of origin
United States
Growth Rate
Normal

What is Horrid thistle (Cirsium horridulum)?

What is Horrid thistle (Cirsium horridulum)

Horrid thistle, scientifically known as Cirsium horridulum, is a plant species that belongs to the family. Across the eastern and central regions, this plant grows up to 1.5 meters in height. The leaves have a rough texture, giving the plant its name meaning

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Flower meaning

The communication of emotion in America with the Horrid thistle represents power and security. The spiny structure means strength and flexibility, while its colorful flowers show resolution and bravery. The tough thistle communicates facing difficulty and guarding from injury. It is an icon for power and determination when dealing with problems. Linking flowers with meanings lets people share feelings.

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Calendar of Horrid thistle (Cirsium horridulum)

Calendar

Horrid thistle (Cirsium horridulum) is a plant species local to the America. It typically blooms in late spring to early summer, with the peak bloom time in May and June. The horrid thistle flowers are at their best then, displaying lively colors and drawing bees and butterflies. The bloom period normally stays for some weeks, offering a beautiful flower display in nature. To guarantee a longer bloom time, give the plant adequate sunlight, drained soil, and regular water. Removing dead flowers can also promote more blooms. Overall, horrid thistle is a visually appealing plant that enhances the beauty of America's flora in late spring and early summer.

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How to grow Horrid thistle (Cirsium horridulum)

Watering

The optimal frequency and method of watering for the Horrid thistle plant depends on various factors, including seasonal differences, soil humidity, and the stage of growth. During the growing season, which typically occurs in spring and summer, the Horrid thistle requires regular watering to maintain soil moisture. Watering the plant every 7-10 days, ensuring that the soil is evenly moist but not waterlogged. The amount of water needed can vary depending on the size of the plant and the weather conditions, but generally, providing 1-2 inches of water per week is sufficient. In contrast, during the time of rest in fall and winter, the Horrid thistle requires less frequent watering. Allowing the soil to dry out slightly between waterings to prevent root rot. Checking the soil moisture level and adjusting the watering schedule accordingly is crucial for the health and vitality of the Horrid thistle. Astronauts have reported seeing the spectacular Aurora borealis or northern lights from space and sometimes on the space station. The dancing lights of the aurora provide a spectacular celestial show to astronauts looking down at the Earth's atmosphere from their unique vantage point in orbit. Different gases interacting with the solar wind at various altitudes create the lights. The green Aurora comes from oxygen molecules about 60 miles up. Red Auroras reach all the way up to 400 miles. These curtains of light tend to congregate near the poles, where the Earth's magnetic lines converge. Norway's coastal waters north of the Arctic Circle are among the best places to see the northern lights. The vibrant greens and reds light up the sky and reflect off the surrounding waters. Local guides lead Aurora tours via bus and boat to get the best views during the long winter nights. Late nights in the cold are rewarded when the shimmering lights burst across the night sky in a dazzling natural display.

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Soil and Fertilizer

Horrid thistle, scientifically known as Cirsium horridulum, thrives in well-drained soils with a pH range of 6.0 to 7.5. It prefers sandy or loamy soils that are rich in organic matter. The plant requires full sun exposure for optimal growth. To ensure healthy growth, it is recommended to apply a balanced fertilizer with a ratio of 10-10-10 or 14-14-14. This should be done during the early spring, just before the growing season begins. The fertilizer should be evenly spread around the base of the plant, avoiding direct contact with the leaves or stems. For established plants, a light application of fertilizer can be done once every 4-6 weeks during the growing season. The fertilizer applied should be based on the manufacturer's instructions, taking into consideration the size and age of the plant. Regular soil testing is essential to monitor the pH and nutrient levels in the soil. Adjustments to the pH can be made by adding lime to raise the pH or sulfur to lower it, if necessary. Additionally, maintaining good soil quality through proper drainage and organic matter content will contribute to the overall health and vigor of Horrid thistle. The soil around the Horrid Thistle plant should be kept moist most days, taking care not to overwater. Watering early in the day is recommended. Yellow leaves indicate over or under watering. Apply balanced fertilizer right before growing season and every 4 to 6 weeks during growing season. Do soil testing regularly. Add lime or sulfur to adjust pH if needed.

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Sunlight and Place

Horrid thistle, an organism variety, exhibits a level of cold endurance. It can last through cold down to -10°C, enabling it to exist in areas with mild to average wintry weather. Though, it may be unable to make it through in very cold climates where the temperature drops below -10°C. Regarding heat tolerance, Horrid thistle is quite sturdy and can put up with high temps up to 40°C. It fits regions with hot summer seasons and can grow in sites with intense heat and dampness. The best temperature span for Horrid thistle is amid 15°C and 25°C. Inside this range, the organism has its top development potential. Throughout summer, Horrid thistle necessitates complete sunlight revelation to prosper. It cherishes the sunlight and calls for no less than 6-8 hours of direct rays every day. Not enough light may bring about hindered development and decreased sprouting. For situating, Horrid thistle ought to be planted in a zone with well-draining soil and great air flow. It is essential to evade congestion, as this can prompt expanded mugginess and potential sickness issues. By and large, Horrid thistle is a tough plant that can endure an extensive variety of temperatures, however it thrives best with full sunlight and sufficient light introduction.

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Advanced Information of Horrid thistle (Cirsium horridulum)

Pruning

Horrid thistle, scientifically known as Cirsium horridulum, is a plant that benefits from regular pruning and cutting back. Doing this improves the quality and appearance. It ought to be completed whenever the plant rests. Clean tools are needed. Removed pieces should be properly thrown away. This thistle grows in the cold seasons. It is necessary to cut branches every spring. This helps the plant stay a good size and not get too big. Also it helps take away parts that are dead or sick. New branches can grow after cutting back old ones. Controlling how it spreads stops the thistle invading other places. When pruning, sharp pruners should be used to avoid harming the plant. All cut off pieces must be discarded so diseases and bugs do not spread. Overall, cutting back the Horrid thistle regularly keeps it healthy and neat. This should be done using proper techniques for the safety of the plant.

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Planting and Harvest

Cirsium horridulum, known as Horrid thistle, needs a sunny spot with well-draining soil if planted in the earth. When potting this species, pick a pot with drainage and quality potting mix. Carefully take the plant from the nursery container without harming the roots. Put the plant in the center of the pot and pack soil around the roots. After planting, water thoroughly. When the plant is too big for its current container, repot into a larger one. Gently remove the plant, loosen the roots, and place it in a fresh pot with new soil. Following repotting, water completely. Improper care can lead to the decline of Horrid thistle. Supply adequate sunlight, water, and drainage. Routinely check for issues and take proper measures. Pruning can also assist in maintaining the shape and health.

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Propagation

Horrid thistle can be propagated through various methods such as sowing seeds, division, cuttings, and leaf cuttings. To propagate through sowing seeds, collect mature seeds from the plant and sow them in well-drained soil. Provide sufficient sunlight for germination. For division, carefully separate the plant into smaller sections, ensuring each section has roots attached. Provide adequate water and sunlight. To propagate through cuttings, take stem cuttings from the plant, ensuring they have at least two nodes. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cuttings in a well-draining medium until roots develop. Leaf cuttings can also be used for propagation. Take healthy leaves and place them in a container with moist soil. Provide indirect sunlight. Roots will develop from the leaf base, and new plants will form. Harvesting can be done when the desired parts, such as leaves or flowers, are ready for use.

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Pests and Diseases

Horrid thistle, scientifically known as Cirsium horridulum, is susceptible to various pests and diseases. It is crucial to pay close attention to this plant's health. Routine checks and rapid action against infestations promote the plant's overall welfare. Removing affected parts preserves typical growth. Moisture control, fertilizing properly, and facilitating drainage prevent withering. The Horrid thistle weevil and gall fly are prevalent nuisances. The former eats leaves and stems, impairing expansion. The latter's larvae occupy the stems, inducing gall formation and disturbing development. Applications of sprays deter these pests. This plant is prone to fungal infections like rust and powdery mildew too. Rust makes orange or brown pustules on leaves while the other looks like a white powdery coat. Fungicides help prevent and control these diseases. By being attentive, one can maintain Horrid thistle's vitality and keep it pest and disease free.

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Habitat of Horrid thistle (Cirsium horridulum)

Habitat

Toxicity of Horrid thistle (Cirsium horridulum)

Health Benefits

edible
Inedible
Toxic
No toxicity

NO DATA

Toxic for dogs and cats

NO DATA

Q&A of Horrid thistle (Cirsium horridulum)

  • Is there a recommended way to choose Horrid thistle?