Aquilegia vulgaris William Guiness - 9cm pot £2.50 Sorry, this plant is currently out of stock. Granny's Bonnets / Columbine. Deep purple, almost black flowers, with white central petals, in late spring. Sun or part shade, any soil. H: 80cm Will self-seed freely, but only comes true from seed if there are no other colours of Aquilegia nearby.