Rough star thistle (Centaurea aspera)

Rough star thistle

Rough star thistle is a member of the thistle family named for its unusual and distinctive star-shaped flowers. You can distinguish rough star thistle by these flowers, which top thorny bases during their long blooming period from spring through to mid-fall.

Scientific classification

Species

Rough star thistle (Centaurea aspera)

Asters bellflowers fanflowers and allies

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Biennial

Lifespan

Herb

Plant Type

Summer, Fall

Bloom Time

33 cm

Plant Height

Green, Blue

Leaf Color

2 cm to 2.5 cm

Flower Size

Distribution of Rough star thistle

Distribution Map

Rough star thistle is native to temperate regions of Europe. It has spread beyond its original range to become introduced and naturalized in different parts of Europe and on other continents such as Australia. The species flourishes in a variety of habitats, adapting to new environments in both its native and introduced territories.

Native

Cultivated

Invasive

Introduced

No species reported

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Care Guide for Rough star thistle

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Rough star thistle, originating from arid regions, demonstrates excellent drought tolerance and requires weekly watering for cultivation. Thriving in full sun, it benefits from deep watering practices to promote strong root growth and resilience in dry conditions.

Fertilize: For rough star thistle, use balanced fertilizers during growth and high-nitrogen before flowering, fertilizing monthly. Adjust seasonally, reduce during dormancy to prevent root burn, ensuring nutrient availability. Wear gloves, water soil before application, and measure accurately for effective, safe fertilization.

Pruning: Rough star thistle features spiny leaves and purple flowers, requiring pruning in early to late spring. Trim dead stems to promote growth but avoid cutting healthy ones. Proper pruning aids in size management, bloom enhancement, and prevents invasiveness. Use clean, sharp tools for optimal care.

Propagation: To propagate rough star thistle, sow fresh seeds in well-drained soil, lightly cover, and maintain consistent moisture. Provide good sunlight for optimal growth. Seedlings may take time to emerge; once established, thin them out to reduce competition and ensure healthy development.

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Distribution of Rough star thistle

Care Guide for Rough star thistle

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