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Onopordum acanthium

Scotch thistle

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Key information

Plant type

Biennial

Flower colour

Purple

Feature

Flowers

Hardiness

Hardy

Skill level

Beginner

Onopordum acanthium

Plant details

The tall statuesque stems of this native Scotch thistle are clad in silvery spiny foliage and topped with a huge pink thistle. It is best planted at the back of a border as it can reach around 3m (10ft). Although it is a biennial, it self-seeds freely and so plants appear each year. Plant in any fertile, well-drained, slightly acidic soil in full sun. This plant is perfect for a sunny gravel or wildlife garden.

Family: Asteraceae

Genus: Onopordum

Species: acanthium

Plant type: Biennial

Flower colour: Purple

Foliage colour: Silver

Feature: Flowers

Sun exposure: Full sun

Soil: Well-drained/light, Acidic

Hardiness: Hardy

Skill level: Beginner

Height: 300cm

Spread: 100cm

Time to plant seeds: September to May

Flowering period: July to September


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