Campanula pyramidalis 'Alba'
Chimney bellflower. This is a spectacular hardy biennial or short-lived perennial species. Large clumps of basal leaves and in summer amazing towering flower stems to at least two metres tall (or more!), each one smothered in open saucer-shaped pure white flowers. Does well in full sun and good fertile soil. Makes a good cutflower for larger arrangements. 2-2.5m H x 40-60cm W. 9cm pot.