P. The common bluebell is Scilla nonscripta (nutans) and is ideal for planting underneath trees. The purple-blue, pink or whiteappear in May. Plant 6 in. deep, other species about 3 in.
The following are shorter in growth to about 4 in. S. bifolia blooms in March with star-like bright blue flowers. There are white and pink forms. In the south-west this species often blooms in early February. S. siberica also blooms in March, and is probably best described as Prussian-blue. The white form is equally lovely, though less robust; the variety Spring Beauty is taller, with rather longerand large blooms. S. Tubergeniana is earlier than the foregoing, being usually in bloom at the beginning of March. It is turquoise-blue with a faint line of blue down the centre of each petal.
The Spanish squill is S. hispanica (campanulata) which produces large, erect spikes with open-bill-like flowers in early May. It should be planted about 5 in. deep and is excellent for naturalising, the bulbs increasing rapidly if left undisturbed. Named varieties include Heavenly Blue, a delightful porcelain-blue colour, Mount Everest, pure white, Peach Blossom, pale pink and Queen of the Blues, purple-blue. All scillas can be increased by division in late summer.