Thompson & Morgan

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Perennial & Biennial Seeds

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!

We have found 2 products.

Allium giganteum

Giant Allium, Ornamental Onion

One of the tallest of the allium species, the spectacular ball-shaped blooms are made up of masses of tiny bright purple flowers and have a diameter of at least 20cm (8"). The airy spheres of bloom are followed by architectural seedheads that create a spectacular autumn display. Undemanding and easy to grow, these magnificent, long lasting allium flowers are also excellent for cutting. Height: 120cm (48"). Spread: 15cm (6").

Useful links:

How to grow bulbs, corms and tubers

More info
    • 1 packet (10 allium seeds)

    • Despatch: Within 1 days
    • £4.79

Fritillaria meleagris (Mixed)

Snake's Head Fritillary

A 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
    • 1 packet (30 seeds)

    • Despatch: Within 1 days
    • £3.99