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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.

Our top alliums for 2025

Alliums are a staple of the summer border and create show-stopper displays that return year after year. This year, we expect our most popular bulbs to sell out quickly, so grab your favourites before they disappear.

The most popular allium is Purple Sensation, and for good reason. Their striking silhouettes make them well-suited to gravel and prairie-style gardens. They have vibrant, densely packed, deep violet star-shaped flowers. The classic drumstick Allium sphaerocephalon is a fantastic late-flowering variety, blooming in July and August. Almost one metre high, they look stunning, planted en-masse and wave gently in the wind.

If you love the classic gigantic blooms, some really beautiful varieties exist. Allium Ambassador can grow up to 18cm across with densely packed flowers. If you love white flowers, Allium Mount Everest is a gigantic bloom that is a true show-stopper. Another giant is Allium giganteum, which lives up to its name at nearly two meters tall. For a large allium that is slightly different, try Allium cristophii with its 20cm wide spheres. The flowers are large stars less densely packed, giving them a galaxy-like appearance. Finally, Allium schubertii with its starburst effect. The flowerheads grow up to 30cm across and make beautiful dried flowers.

Facing
How much sun
Soil type
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Flower colour
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Attractive to wildlife
Quick growing
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Ready made borders
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Used at Chelsea
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Showing Bulbs Allium bulbs clear all
44 items
Shades of purple - Allium collection
Shades of purple - allium collection
£26.75 - £53.50
1 × collection | 50 bulbs Delivered during September
2 + 1 FREE collections | 150 bulbs Delivered during September
Allium hollandicum Purple Sensation
Allium hollandicum 'Purple Sensation'
£6.79 - £109.99
10 × bulbs Delivered during September
5 × bulbs | organic Delivered during September
30 × bulbs Delivered during September
15 × bulbs | organic Delivered during September
150 × bulbs Delivered during September
250 × bulbs Delivered during September
2 litre pot | 3 per pot available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 52
Big bold allium collection
Big bold allium collection
£28.75 - £57.50
1 × collection | 30 bulbs Delivered during September
2 + 1 FREE collections | 90 bulbs Delivered during September
Allium Miami
Allium 'Miami'
£5.99 - £11.98
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
Amethyst allium collection
Amethyst allium collection
£27.75 - £55.50
1 × collection | 50 bulbs Delivered during September
2 + 1 FREE collections | 150 bulbs Delivered during September
Allium Purple Rain
Allium 'Purple Rain'
£5.99 - £11.98
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
0.75 star 1 star 1 star 1 star 1 star 4.7 5 52
Best white allium collection
Best white allium collection
£19.45 - £38.90
1 × collection | 40 bulbs Delivered during September
2 + 1 FREE collections | 120 bulbs Delivered during September
Allium roseum
Allium roseum
£7.99 - £15.98
25 × bulbs Delivered during September
50 + 25 FREE bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 5.0 5 6
Allium atropurpureum
Allium atropurpureum
£7.99 - £15.98
10 × bulbs Delivered during September
20 + 10 FREE bulbs Delivered during September
0.75 star 1 star 1 star 1 star 1 star 4.7 5 11
Allium sphaerocephalon
Allium sphaerocephalon
£3.99 - £79.99
25 × bulbs Delivered during September
50 + 25 FREE bulbs Delivered during September
1000 × bulbs Delivered during September
2 litre pot | 7 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.5 star 1 star 1 star 1 star 1 star 4.6 5 31
Allium stipitatum Violet Beauty
Allium stipitatum 'Violet Beauty'
£4.99 - £9.90
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 5.0 5 4
Allium nigrum
Allium nigrum
£6.99 - £13.98
10 × bulbs Delivered during September
20 + 10 FREE bulbs Delivered during September
0.25 star 1 star 1 star 1 star 1 star 4.3 5 4
Allium schubertii
Allium schubertii
£11.99 - £21.00
5 × bulbs Delivered during September
10 × bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 5.0 5 4
Allium siculum
Allium siculum
£12.99 - £30.00
25 × bulbs Delivered during September
75 × bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 4.9 5 9
Allium karataviense
Allium karataviense
£6.99 - £18.00
5 × bulbs Delivered during September
15 × bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 5.0 5 1
Allium giganteum
Allium giganteum
£7.99 - £21.00
1 × bulb Delivered during September
3 × bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star 5.0 5 9
Allium stipitatum Mount Everest
Allium stipitatum 'Mount Everest'
£5.49 - £35.98
1 × bulb Delivered during September
3 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 3
Allium Globemaster
Allium 'Globemaster'
£7.99 - £35.98
1 × bulb Delivered during September
5 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.8 5 10
Award-winning allium collection
Award-winning allium collection
£26.75 - £53.50
1 × collection | 50 bulbs Delivered during September
2 + 1 FREE collections | 150 bulbs Delivered during September
Stunning Allium collection
Stunning allium collection
£17.75 - £35.50
1 × collection | 45 bulbs Delivered during September
2 + 1 FREE collections | 135 bulbs Delivered during September
Allium Ambassador
Allium 'Ambassador'
£9.99 - £26.90
1 × bulb Delivered during September
3 × bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star
Allium hollandicum (aflatunense)
Allium hollandicum (aflatunense)
£5.99 - £11.98
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
0.75 star 1 star 1 star 1 star 1 star
Designer allium bulb collection
Designer allium collection
£19.45 - £38.90
1 × collection | 75 bulbs Delivered during September
2 + 1 FREE collections | 225 bulbs Delivered during September
1 star 1 star 1 star 1 star 1 star
Striking allium collection
Striking allium collection
£13.75 - £27.50
1 × collection | 20 bulbs Delivered during September
2 + 1 FREE collections | 60 bulbs Delivered during September
Chelsea Jewelled Allium collection
Chelsea jewelled allium collection
£14.95 - £29.90
1 × collection | 20 bulbs Delivered during September
2 + 1 FREE collections | 60 bulbs Delivered during September
Allium convallarioides yellow-flowered
Allium convallarioides 'yellow-flowered'
£9.99 - £28.00
10 × bulbs Delivered during September
30 × bulbs Delivered during September
Allium Powder Puff
Allium 'Powder Puff'
£5.99 - £15.00
5 × bulbs Delivered during September
15 × bulbs Delivered during September
Allium Mont Blanc
Allium 'Mont Blanc'
£6.99 - £18.00
1 × bulb Delivered during September
3 × bulbs Delivered during September
Allium amplectens Graceful Beauty
Allium amplectens 'Graceful Beauty'
£5.49 - £10.98
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
0 star 0 star 0.5 star 1 star 1 star
Favourite Alliums Collection
Favourite Alliums Collection
£35.99 - £71.98
1 × collection | 28 bulbs Delivered during September
2 + 1 FREE collections | 84 bulbs Delivered during September
Allium Eros
Allium 'Eros'
£5.99 - £11.00
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
0 star 0.5 star 1 star 1 star 1 star
Allium Caméléon
Allium 'Caméléon'
£6.99 - £13.98
10 × bulbs Delivered during September
20 + 10 FREE bulbs Delivered during September
Butterfly allium collection
Butterfly allium collection
£17.75 - £35.50
1 × collection | 45 bulbs Delivered during September
2 + 1 FREE collections | 135 bulbs Delivered during September
Allium moly
Allium moly
£6.99 - £13.98
50 × bulbs Delivered during September
100 + 50 FREE bulbs Delivered during September
0.25 star 1 star 1 star 1 star 1 star
Allium cristophii
Allium cristophii
£4.99 - £35.98
5 × bulbs Delivered during September
10 + 5 FREE bulbs Delivered during September
2 litre pot | 3 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
0.75 star 1 star 1 star 1 star 1 star
Allium Ambassador 'XXL bulb'
Allium 'Ambassador' (XXL bulb)
£12.99 - £36.00
1 × bulb | extra large Delivered during September
3 × bulbs | extra large Delivered during September
Allium Mercurius (PBR)
Allium 'Mercurius' (PBR)
£6.99 - £25.00
1 × bulb Delivered during September
5 × bulbs Delivered during September
Allium neapolitanum Cowanii Group
Allium neapolitanum Cowanii Group
£5.49 - £10.98
25 × bulbs Delivered during September
50 + 25 FREE bulbs Delivered during September
0 star 0.25 star 1 star 1 star 1 star
Allium Round n Purple
Allium Round 'n' Purple
£9.99 - £28.99
1 × bulb Delivered during September
3 × bulbs Delivered during September
Allium Gladiator
Allium 'Gladiator'
£17.99 - £47.00
5 × bulbs Delivered during September
15 × bulbs Delivered during September
2 litre pot | 1 per pot available to order from autumn
2 + 1 FREE 2 litre pots available to order from autumn
1 star 1 star 1 star 1 star 1 star
Allium unifolium
Allium unifolium
£9.99 - £27.00
25 × bulbs Delivered during September
75 × bulbs Delivered during September
Allium caeruleum
Allium caeruleum
£8.49 - £16.98
20 × bulbs Delivered during September
40 + 20 FREE bulbs Delivered during September
0 star 1 star 1 star 1 star 1 star
Allium Silver Spring
Allium 'Silver Spring'
£9.99 - £18.98
1 × bulb Delivered during September
2 + 1 FREE bulbs Delivered during September
200 alliums
200 alliums Save £5.99!
£34.95
1 × collection Delivered during September

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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