Slender thistle (Carduus tenuiflorus)

Slender thistle

Also known as: Winged slender thistle, Seaside thistle

Out of its native region, the slender thistle is considered an invasive weed that significantly reduces the quality of forage pastures. It tends to appear in disturbed sites as well, like parking lots and along roads. This impressive thistle can grow up to 2 m tall and often grows together with the Shore slender thistle (Carduus pycnocephalus).

Scientific classification

Species

Slender thistle (Carduus tenuiflorus)

Asters bellflowers fanflowers and allies

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Annual

Lifespan

Herb

Plant Type

2 m

Plant Height

8 mm

Flower Size

Purple, Pink

Flower Color

Semi-evergreen

Leaf type

Images of Slender thistle

Distribution of Slender thistle

Distribution Map

Slender thistle is originally native to the Mediterranean region. It has spread to become naturalized in parts of South America, Northern Europe, South Africa, and the Indian subcontinent. This thistle species thrives in temperate climates and has shown adaptability to various environmental conditions beyond its native range.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Waste ground, pastures, roadsides, fields

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Slender thistle

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Slender thistle thrives in temperate regions with moderate water availability and prefers well-drained soil. Its watering needs are moderate, requiring weekly watering. An outdoor plant, it has adapted its growth cycle to align with seasonal rainfall patterns for optimal water usage.

Pruning: Slender thistle features dense spiny foliage and purple flowers. Prune in early to late spring to manage invasiveness, removing dead stems and preventing seed spread. Use sharp tools and gloves for safety. Regular pruning reduces competition and overcrowding. Refer to horticultural guides for detailed care tips.

Propagation: Slender thistle is a resilient, slender thistly species propagated through sowing. Gardeners should evenly disperse seeds in prepared soil and maintain consistent moisture. Thinning seedlings promotes optimal growth spacing, ensuring vigorous development through careful attention to these guidelines.

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