Thompson & Morgan

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Allium Bulbs


Alliums are easy to grow and undemanding summer flowers, adding height and structure to your beds and borders. Ideal as cut flowers, they're also striking in the autumn, when the structural seed heads create an eye-catching display. Read our guide for more information on how to grow bulbs.

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Allium Collection

Ornamental Onion

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Upright stems add a strong vertical accent to cottage garden borders. These magnificent allium bulbs produce an explosion of colour, followed by architectural seedheads that create a spectacular autumn display. Undemanding and easy to grow, these magnificent allium flowers are also excellent for cutting.

  • Allium ostrowskianum (25 bulbs) - Bright pink, bell-shaped flowers in early summer. Height: 20cm (8"). Spread: 5cm (2").
  • Allium moly (30 bulbs) - A vigorous little allium with golden yellow flowers that is ideal for naturalising in informal planting schemes. Height: 15cm (6") Spread: 5cm (2").
  • Allium sphaerocephalon (25 bulbs) - An understated allium with unusual oval shaped, purple green flower heads, that associates beautifully with swaying grasses. Height: 60cm (24"). Spread: 8cm (3").
  • Allium caeruleum (15 bulbs) - Bright blue globes of starry flowers are carried on stiff upright stems. Height: 60cm (24"). Spread: 8cm (3").
  • Allium ‘Purple Sensation’ (5 bulbs) - Globes of starry purple flowers that measure up to 8cm (3") across. Height: 90cm (36"). Spread: 10cm (4").

Useful links:

How to grow bulbs, corms and tubers 

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    • 100 bulb mix

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    • £17.99 £15.99
    • Out of stock