Allium Flower Bulbs

Allium Flower Bulbs

The allium flower is iconic in the typical English country garden for its architectural and vibrant globe-like flower heads. These allium bulbs are ornamental onions grown for their stunning blooms.

Dot these flower bulbs amongst grasses and perennial flower plants for a natural border. Our quality range at D.T. Brown encompasses a variety of heights and shades to suit any section of the border. Plant these autumn-planting flower bulbs in the season and wait to be thrilled the following summer.

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12 products

Allium Border Flower Bulb MixAllium Border Flower Bulb Mix
50 Mixed Bulbs Code: 47847

Sale price £14.95
Purple flowering plants in a garden setting with greenery.
50 Bulbs Code: 46640

Sale price £8.95
Allium Siculum Nectaroscordum Flower BulbsAllium Siculum Nectaroscordum Flower Bulbs
20 Bulbs Code: 65073

Sale price £9.95
Purple allium flowers in a garden setting with green foliage.Close-up of purple allium flowers with a blurred green background
15 bulbs Code: 46638

Sale price £9.95
Allium atropurpureum Flower Bulbs
10 Bulbs Code: 46634

Sale price £9.50
Close-up of purple allium flowers with a blurred green background
20 bulbs Code: 46635

Sale price £8.95
Allium cristophii Bulbs
15 Bulbs Code: 46636

Sale price £9.95
Allium Border Mix Twin PackAllium Border Mix Twin Pack
100 Mixed Bulbs Code: 50736

Sale price £20.95
Allium atropurpureum & nigrum Bulb CollectionAllium atropurpureum & nigrum Bulb Collection
20 Bulbs Code: 48970

Sale price £12.95
Purple spherical flowers with green stems against a blurred green backgroundClose-up of purple globe onions with a blurred green background
3 bulbs Code: 46637

Sale price £12.95
Allium nigrum Flower Bulbs
10 bulbs Code: 48163

Sale price £8.95
Allium Schubertii Flower BulbsAllium Schubertii Flower Bulbs
5 Bulbs Code: 65070

Sale price £10.45
Allium Flower Bulbs Allium Flower Bulbs

Growing Allium Bulbs

Your allium bulbs should be planted between early and mid-autumn. Plant them in a sunny spot with moist, well-drained soil. Be sure not to plant them in waterlogged or frozen soil, as their growth will be impacted.

Plant your allium bulbs at a depth of around four times the height of the bulb, at least 15cm (6in) deep. Depending on the height of your allium bulbs, you should plant them around 8cm (3in) apart for smaller varieties and around 20cm (8in) for taller varieties.

Looking after allium bulbs is simple once they are established. As these bulbs are drought-tolerant, watering them is not generally necessary and could even cause rotting. Feeding them is also not usually needed, though they will benefit from garden fertiliser added in spring for poor soil conditions.

Once the warm weather arrives, your alliums will flower from late May into early summer. They produce flowers year after year, up to four years after planting. They can be left over winter, as they are hardy, don’t need to be deadheaded and their dried flower heads look attractive.

Order Your Allium Bulbs Today

At D.T. Brown, we have been selling flower bulbs, seeds, and plants to UK home gardeners for over a century. From gladiolus bulbs to muscari bulbs, all of our flower bulbs are specially chosen for their quality for a 100% satisfaction guarantee.

Order your allium bulbs from D.T. Brown. Shop from our collection today and prepare your garden for beautiful summertime blooms.

We aim to dispatch all UK seed orders within 3-5 working days, and anything else within 5-7 working days. Live products will be dispatched at their optimum time for planting.