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Biennials live for 2 years, whereas perennials live for longer. As a general rule, biennial and perennial seeds should be sown in spring, but some can be sown in autumn as well. Many varieties will self-seed after flowering, giving you even more plants!
Giant Allium, Ornamental Onion
Useful links:More info
Fritillaria meleagris (Mixed)
Snake's Head FritillaryA beautiful hardy bulb with white pendant 1½in (4cm) blooms heavily chequered with pink, plum or purple. Snakes's Head Fritillary can be grown in grass and often self seeds to make delightful colonies of nodding bells. More info
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