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Allium Bulbs

Allium bulbs are easy to grow and add colour to borders. Alliums are a great pollinator plant in various purples, blues, whites and yellows. They are perfect for adding architectural structure from May to June, and their seedheads add interest well into autumn.

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Used at RHS Chelsea Flower Show
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Showing Bulbs Allium bulbs clear all
34 items
Allium Ambassador

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Allium 'Ambassador'
From £9.99
1 × bulb
3 × bulbs
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Allium Ambassador 'XXL bulb'

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Allium 'Ambassador' (XXL bulb)
From £12.99
1 × bulb | extra large
3 × bulbs | extra large
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Allium amplectens Graceful Beauty

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Allium amplectens 'Graceful Beauty'
From £5.99
5 × bulbs
10 + 5 FREE bulbs
0 star 0 star 0.5 star 1 star 1 star 2.5 5 2 (2)
Allium atropurpureum

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Allium atropurpureum
From £7.99
10 × bulbs
20 + 10 FREE bulbs
0.75 star 1 star 1 star 1 star 1 star 4.7 5 11 (11)
Allium caeruleum

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Allium caeruleum
From £8.49
20 × bulbs
40 + 20 FREE bulbs
0 star 1 star 1 star 1 star 1 star 4.0 5 7 (7)
Allium Caméléon

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Allium 'Caméléon'
From £6.99
10 × bulbs
20 + 10 FREE bulbs
Allium convallarioides yellow-flowered

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Allium convallarioides 'yellow-flowered'
From £9.99
10 × bulbs
30 × bulbs
Allium cristophii

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Allium cristophii
From £4.99
5 × bulbs
10 + 5 FREE bulbs
0.75 star 1 star 1 star 1 star 1 star 4.7 5 55 (55)
Allium Eros

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Allium 'Eros'
From £5.99
5 × bulbs
10 + 5 FREE bulbs
0 star 0.5 star 1 star 1 star 1 star 3.5 5 2 (2)
Allium giganteum

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Allium giganteum
From £8.49
1 × bulb
3 × bulbs
1 star 1 star 1 star 1 star 1 star 5.0 5 10 (10)
Allium Gladiator

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Allium 'Gladiator'
From £12.99
5 × bulbs
15 × bulbs
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Allium Globemaster

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Allium 'Globemaster'
From £7.99
1 × bulb
5 × bulbs
0.75 star 1 star 1 star 1 star 1 star 4.8 5 11 (11)
Allium hollandicum (aflatunense)

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Allium hollandicum (aflatunense)
From £5.99
5 × bulbs
10 + 5 FREE bulbs
0.75 star 1 star 1 star 1 star 1 star 4.7 5 7 (7)
Allium hollandicum Purple Sensation

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Allium hollandicum 'Purple Sensation'
From £6.79
10 × bulbs
5 × bulbs | organic
30 × bulbs
15 × bulbs | organic
+ 2 more available
0.75 star 1 star 1 star 1 star 1 star 4.7 5 55 (55)
Allium karataviense

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Allium karataviense
From £6.99
5 × bulbs
15 × bulbs
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Allium Mercurius (PBR)

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Allium 'Mercurius' (PBR)
From £6.99
1 × bulb
5 × bulbs
Allium Miami

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Allium 'Miami'
From £5.99
5 × bulbs
10 + 5 FREE bulbs
Allium moly

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Allium moly
From £7.99
50 × bulbs
100 + 50 FREE bulbs
0.25 star 1 star 1 star 1 star 1 star 4.3 5 4 (4)
Allium Mont Blanc

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Allium 'Mont Blanc'
From £6.99
1 × bulb
3 × bulbs
Allium neapolitanum Cowanii Group

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Allium neapolitanum Cowanii Group
From £5.49
25 × bulbs
50 + 25 FREE bulbs
0 star 0.25 star 1 star 1 star 1 star 3.3 5 6 (6)
Allium nigrum

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Allium nigrum
From £6.99
10 × bulbs
20 + 10 FREE bulbs
0.25 star 1 star 1 star 1 star 1 star (4)
Allium Powder Puff

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Allium 'Powder Puff'
From £11.00
5 × bulbs
15 × bulbs
Allium Purple Rain

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Allium 'Purple Rain'
From £5.99
5 × bulbs
10 + 5 FREE bulbs
0.75 star 1 star 1 star 1 star 1 star (55)
Allium roseum

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Allium roseum
From £7.99
25 × bulbs
50 + 25 FREE bulbs
1 star 1 star 1 star 1 star 1 star (6)
Allium schubertii

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Allium schubertii
From £11.99
5 × bulbs
10 × bulbs
1 star 1 star 1 star 1 star 1 star (4)
Allium schubertii Arctic Snow

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Allium schubertii 'Arctic Snow'
From £11.99
3 × bulbs
9 × bulbs
Allium siculum

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Allium siculum
From £12.99
25 × bulbs
75 × bulbs
1 star 1 star 1 star 1 star 1 star (9)
Allium Silver Spring

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Allium 'Silver Spring'
From £9.99
1 × bulb
2 + 1 FREE bulbs
Allium sphaerocephalon

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Allium sphaerocephalon
From £3.99
25 × bulbs
50 + 25 FREE bulbs
1000 × bulbs
0.75 star 1 star 1 star 1 star 1 star (35)
Allium stipitatum Mount Everest

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Allium stipitatum 'Mount Everest'
From £5.49
1 × bulb
3 × bulbs
0.75 star 1 star 1 star 1 star 1 star (3)
Allium stipitatum Violet Beauty

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Allium stipitatum 'Violet Beauty'
From £4.99
5 × bulbs
10 + 5 FREE bulbs
1 star 1 star 1 star 1 star 1 star (4)
Allium unifolium

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Allium unifolium
From £9.99
25 × bulbs
75 × bulbs
Amethyst allium collection

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Amethyst allium collection
From £27.75
1 × collection | 50 bulbs
2 + 1 FREE collections | 150 bulbs
Award-winning allium collection

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Award-winning allium collection
From £26.75
1 × collection | 50 bulbs
2 + 1 FREE collections | 150 bulbs

Top allium advice

When to plant allium bulbs

  • The best time to plant allium bulbs is between early and mid-autumn. Make sure you get them in time by buying your allium bulbs online and getting them delivered before planting season begins.

    Plant bulbs between September and November so they have time to establish strong root systems before the cold sets in. When spring arrives, your alliums can direct their energy into growing flowers instead of their root systems.

    Read more about how to plant allium bulbs in our comprehensive guide.

Alliums for drought-tolerant gardens

  • Alliums are a fabulous plant for drought-tolerant planting schemes. People often use them in Mediterranean or gravel garden schemes as they don't need much water and thrive in full sun.

    Sarah Price used them in our Nurture Landscapes Garden at the RHS Chelsea Flower Show this year. Sarah drew on inspiration from Cedric Morris's Benton End garden. She planted perennials and bulbs in naturalistic drifts for a drought-tolerant show-stopper. One of the main bulbs featured was allium siculum. Allium siculum, known as Sicilian honey garlic, is an exquisite form that creates an umbrella of apricot bell-shaped flowers. It flowers from May into June and looks wonderful in a natural planting scheme.

    Other popular Chelsea varieties are Allium atropurpureum with deep purple flowers and blueberry purple centres. You can pair it with Allium nigrum, with its perfect white star flower and green centre.

Our top allium collections

  • Take the guesswork out of which alliums to plant together with our curated allium bulb collections. They make buying allium bulbs online effortless by combining different flowering periods, heights and types for show-stopping summer displays.

    Try all the classics with our award-winning allium collection. The RHS trialled alliums in 2015, and these were some of the best, each winning an Award of Garden Merit. It combines Allium sphaerocephalon, Purple Sensation, Purple Rain, Violet Beauty and Cristophii. This beautiful collection will flower from May to August and is beneficial to pollinators.

    We picked three alliums that attract butterflies and made a butterfly collection for people who want a butterfly-filled garden. Allium Purple Sensation, nigrum and sphaerocephalon will create a beautiful display that will draw butterflies throughout the summer.

    If you prefer smaller, daintier alliums, we have our 200 allium bulb collection. It contains 200 dainty bulbs that will fill your borders for months of colours. Combining Allium moly, Cowanii Group, roseum, sphaerocephalon and unifolium, plant them at the front of borders for the biggest impact.

Giant allium bulbs

  • Add architectural structure to your borders with giant alliums, growing up to nearly two meters tall and with 30cm flowerheads. The biggest of the giant alliums must be gigantium. With deep lilac-pink flowers that form densely packed spheres, it stands at 1.8m tall.

    Gladiator is a great light lavender with large flowerheads that stand on upright stems above most herbaceous perennials. Round 'n' Purple has impressively large flower heads, one of the largest in the allium family. Plant in borders for maximum impact.

    See all giant allium bulbs

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