Buy Cosmos bipinnatus 'Purity' from Sarah Raven: Cosmos bipinnatus 'Purity' has large, open flowers of pure white, with delicate apple-green foliage. The classic cut flower and a supremely lovely garden plant, which no one should be without.
The first perennial my Dad bought for me. Scabiosa caucasia perfecta ‘Alba’ is the classic, long-flowering white form of scabious. Scabious are classic British garden plants and are invaluable for their hugely long flowering season, good vase life an