Plant Encyclopedia
Onopordon Acanthium - Scotch Thistle, Onopordon

Onopordon Acanthium - Scotch Thistle, Onopordon

Type Herbaceous, Deciduous
Size Large Border (1 to 3m height)
Form Spikey
Colours Silver Foliage, Dark blue Flowers (Summer)
Care Regular maintenance required
Hardiness Frost hardy
Growth Fast growing

This startling looking plant is a real statement plant. Its reflective silver gray heavily spined foliage really stands out and is crowned by terminal mauve blue flowers that are much loved by bees.

Cultivation tips: Scotch Thistle is a fast growing biennial that grows onwards and upwards at a startling rate. It will tolerate any well drained soil in full sun and it will freely spread among other herbaceous plants. This plant requires staking and a sheltered location. Plant towards towards the back of the border and allow to grow up through surrounding plants.
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