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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.

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Used at Chelsea
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46 items
Allium hollandicum Purple Sensation
Allium hollandicum 'Purple Sensation'
£6.79 - £99.99
2 litre pot | 3 per pot In stock (shipped within 2-3 working days)
2 + 1 FREE 2 litre pots In stock (shipped within 2-3 working days)
10 × bulbs available to order from autumn
5 × bulbs | organic available to order from autumn
30 × bulbs available to order from autumn
15 × bulbs | organic available to order from autumn
150 × bulbs available to order from autumn
250 × bulbs available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 51
Allium sphaerocephalon
Allium sphaerocephalon
£3.99 - £89.99
2 litre pot | 7 per pot In stock (shipped within 2-3 working days)
25 × bulbs available to order from autumn
50 + 25 FREE bulbs available to order from autumn
1000 × bulbs available to order from autumn
0.5 star 1 star 1 star 1 star 1 star 4.6 5 29
Allium cristophii
Allium cristophii
£4.89 - £35.98
2 litre pot | 3 per pot In stock (shipped within 2-3 working days)
2 + 1 FREE 2 litre pots In stock (shipped within 2-3 working days)
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 51
Shades of purple - Allium collection
Shades of purple - allium collection
£25.45 - £50.90
1 × collection | 50 bulbs available to order from autumn
2 + 1 FREE collections | 150 bulbs available to order from autumn
Butterfly allium collection
Butterfly allium collection
£44.45 - £88.90
1 × collection | 45 bulbs available to order from autumn
2 + 1 FREE collections | 135 bulbs available to order from autumn
Best white allium collection
Best white allium collection
£19.45 - £38.90
1 × collection | 40 bulbs available to order from autumn
2 + 1 FREE collections | 120 bulbs available to order from autumn
Allium schubertii Arctic Snow
Allium schubertii 'Arctic Snow'
£9.49 - £27.00
3 × bulbs available to order from autumn
9 × bulbs available to order from autumn
Allium stipitatum Violet Beauty
Allium stipitatum 'Violet Beauty'
£4.99 - £9.78
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 4
Allium schubertii
Allium schubertii
£9.99 - £19.00
5 × bulbs available to order from autumn
10 × bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 4
Allium siculum
Allium siculum
£9.99 - £29.00
25 × bulbs available to order from autumn
75 × bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 4.9 5 9
Allium Ambassador
Allium 'Ambassador'
£8.99 - £24.00
1 × bulb available to order from autumn
3 × bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 1
Allium nigrum
Allium nigrum
£6.48 - £12.96
10 × bulbs available to order from autumn
20 + 10 FREE bulbs available to order from autumn
0.25 star 1 star 1 star 1 star 1 star 4.3 5 4
Allium Globemaster
Allium 'Globemaster'
£7.99 - £35.98
1 × bulb available to order from autumn
2 litre pot | 1 per pot available to order from autumn
5 × bulbs 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
Allium hollandicum (aflatunense)
Allium hollandicum (aflatunense)
£4.99 - £9.98
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 7
Big bold allium collection
Big bold allium collection
£27.45 - £54.90
1 × collection | 30 bulbs available to order from autumn
2 + 1 FREE collections | 90 bulbs available to order from autumn
Allium Miami
Allium 'Miami'
£5.99 - £11.98
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
Allium roseum
Allium roseum
£7.99 - £15.98
25 × bulbs available to order from autumn
50 + 25 FREE bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 6
Allium atropurpureum
Allium atropurpureum
£7.99 - £15.98
10 × bulbs available to order from autumn
20 + 10 FREE bulbs available to order from autumn
0.75 star 1 star 1 star 1 star 1 star 4.7 5 11
Allium karataviense
Allium karataviense
£6.99 - £18.00
5 × bulbs available to order from autumn
15 × bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star 5.0 5 1
Allium giganteum
Allium giganteum
£7.99 - £21.00
1 × bulb available to order from autumn
3 × bulbs available to order from autumn
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 available to order from autumn
3 × bulbs available to order from autumn
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
Allium convallarioides yellow-flowered
Allium convallarioides 'yellow-flowered'
£9.99 - £28.00
10 × bulbs available to order from autumn
30 × bulbs available to order from autumn
Allium Powder Puff
Allium 'Powder Puff'
£5.99 - £15.00
5 × bulbs available to order from autumn
15 × bulbs available to order from autumn
Allium amplectens Graceful Beauty
Allium amplectens 'Graceful Beauty'
£5.49 - £10.98
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
0 star 0 star 0.5 star 1 star 1 star
Allium Mont Blanc
Allium 'Mont Blanc'
£6.99 - £18.00
1 × bulb available to order from autumn
3 × bulbs available to order from autumn
Allium Ambassador 'XXL bulb'
Allium 'Ambassador' (XXL bulb)
£12.99 - £36.00
1 × bulb | extra large available to order from autumn
3 × bulbs | extra large available to order from autumn
Allium Purple Rain
Allium 'Purple Rain'
£5.99 - £11.98
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
0.75 star 1 star 1 star 1 star 1 star
Allium Mercurius (PBR)
Allium 'Mercurius' (PBR)
£6.99 - £25.00
1 × bulb available to order from autumn
5 × bulbs available to order from autumn
Allium neapolitanum Cowanii Group
Allium neapolitanum Cowanii Group
£5.99 - £11.98
25 × bulbs available to order from autumn
50 + 25 FREE bulbs available to order from autumn
0 star 0.25 star 1 star 1 star 1 star
Allium Gladiator
Allium 'Gladiator'
£12.99 - £35.98
5 × bulbs available to order from autumn
2 litre pot | 1 per pot available to order from autumn
15 × bulbs 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 available to order from autumn
75 × bulbs available to order from autumn
Allium caeruleum
Allium caeruleum
£7.99 - £15.98
20 × bulbs available to order from autumn
40 + 20 FREE bulbs available to order from autumn
0 star 1 star 1 star 1 star 1 star
Allium Silver Spring
Allium 'Silver Spring'
£9.99 - £18.98
1 × bulb available to order from autumn
2 + 1 FREE bulbs available to order from autumn
Allium Round n Purple
Allium Round 'n' Purple
£9.99 - £28.00
1 × bulb available to order from autumn
3 × bulbs available to order from autumn
Allium Eros
Allium 'Eros'
£5.99 - £11.00
5 × bulbs available to order from autumn
10 + 5 FREE bulbs available to order from autumn
0 star 0.5 star 1 star 1 star 1 star
Allium Caméléon
Allium 'Caméléon'
£6.99 - £13.98
10 × bulbs available to order from autumn
20 + 10 FREE bulbs available to order from autumn
Allium moly
Allium moly
£6.99 - £13.98
50 × bulbs available to order from autumn
100 + 50 FREE bulbs available to order from autumn
0.25 star 1 star 1 star 1 star 1 star
200 alliums
200 alliums Save £5.99!
£34.95
1 × collection available to order from autumn
Award-winning allium collection
Award-winning allium collection
£26.45 - £52.90
1 × collection | 50 bulbs available to order from autumn
2 + 1 FREE collections | 150 bulbs available to order from autumn
Stunning Allium collection
Stunning allium collection
£17.25 - £34.50
1 × collection | 45 bulbs available to order from autumn
2 + 1 FREE collections | 135 bulbs available to order from autumn
Amethyst allium collection
Amethyst allium collection
£26.75 - £53.50
1 × collection | 50 bulbs available to order from autumn
2 + 1 FREE collections | 150 bulbs available to order from autumn
Designer allium bulb collection
Designer allium collection
£19.95 - £39.90
1 × collection | 75 bulbs available to order from autumn
2 + 1 FREE collections | 225 bulbs available to order from autumn
1 star 1 star 1 star 1 star 1 star
Striking allium collection
Striking allium collection
£14.95 - £29.90
1 × collection | 20 bulbs available to order from autumn
2 + 1 FREE collections | 60 bulbs available to order from autumn
Chelsea Jewelled Allium collection
Chelsea jewelled allium collection
£14.45 - £28.90
1 × collection | 20 bulbs available to order from autumn
2 + 1 FREE collections | 60 bulbs available to order from autumn
Allium His Excellency
Allium 'His Excellency'
£7.99 - £22.00
3 × bulbs available to order from autumn
9 × bulbs available to order from autumn
Allium tripedale
Allium tripedale
£14.99 - £39.99
1 × bulb available to order from autumn
3 × bulbs available to order from autumn

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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