Cottonthistles (Onopordum)

Cottonthistles

Cottonthistles are a genus of biennial and perennial thistle plants native to Europe, Africa, and Asia. They have been introduced as ornamental plants in North America and Australia, where some species are considered noxious weeds. A variety of cottonthistles has been used as the national symbol of Scotland.

Scientific classification

Genus

Cottonthistles (Onopordum)

Family

Daisy

Order

Asters bellflowers fanflowers and allies

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Biennial

Lifespan

Semi-evergreen

Leaf type

Images of Cottonthistles

Species

Scotch thistle Illyrian cottonthistle Bull cotton thistle Onopordum cynarocephalum

Care Guide for Cottonthistles

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Cottonthistles thrives in moderate climates with consistent moisture, requiring weekly watering for optimal health. While drought-tolerant, it prefers reliable water availability. Best suited for outdoor growth, cottonthistles is sensitive to soil moisture, especially during the growing season, impacting its spiny foliage.

Propagation: The primary propagation method for cottonthistles is seed sowing, requiring full sunlight, low fertility soil, and cold stratification. Collect seeds in late summer, chill for 2-4 weeks, sow in early spring, and thin seedlings. Propagation by cuttings or division is ineffective, indicating moderate difficulty.

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How to Grow and Care

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