Cirsium prefer a sunny spot and will grow well in most moist, but well-drained soils. Apply a generous layer of mulch after planting to retain moisture levels and water well during the summer months until established. Applying a general liquid fertiliser in spring will help promote healthy growth. Divide congested plants in autumn or early spring and if desired, cut back hard after flowering to prevent self-seeding.
Cirsium Atropurpurea (Thistle)
‘Atropurpureum’ is a deciduous perennial bearing deep crimson thistles on long, leafless stems that tower above the spiny, dark green leaves. Loved by butterflies and bees alike, the flowerheads fade to a form a lovely seed head in the autumn garden. Perfect for planting towards the back of a sunny herbaceous border with grasses and other tall perennials. It’s no wonder this beautiful variety has an RHS Award of Garden Merit.
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