1.2 litre sized pot.  Aquilegia vulgaris var.stellata Black Barlow is a stunning coloured flower to have in the garden.  I grow mine next to geums and dark foliaged canna to compliment and contrast against the dark plum-purple coloured flowers that arrive in mid-late spring.  Feathery green foliage recognised with Aquilegias and the flowers reach up to 75 cm high.  Great as a cut flower.  Likes full sun to part shade, medium moisture and well-drained soils.