Cirsium rivulare 'Trevor's Blue Wonder'

Cirsium rivulare 'Trevor's Blue Wonder'

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Not quite a blue-flowered form, but the spectacular large, mauve-purple, thistle-like flowers are held on stiff stems, above the dark green leaves.

June-September flowering. Best in a sunny position in most garden soils. 120cm x 60cm (4' x 2').