Allium bulbs

At XXLplant you buy allium bulbs, also known as ornamental onions, in the quantity you need. Allium flowers in May, June and July with round flower heads on tall stems, just as the tulips are over. Choose from varieties such as Purple Sensation, Gladiator, Mount Everest, Christophii and the drumstick allium. The page puts together the best-value bags for your number.

Allium bulbs

Ornamental onions fill the gap between spring bulbs and summer flowers. In most varieties the flower heads are purple or white, from small and egg-shaped in the drumstick allium to large and round in Gladiator and Mount Everest. After flowering the seed heads stay standing for a long time. They also look good in a dried arrangement.

Plant allium bulbs from October to mid-December in a sunny spot with free-draining soil. Large bulbs go about 15 to 20 centimetres deep, small varieties less deep. Space large alliums well apart and plant small ones such as the drumstick allium in groups. The per m² calculator shows how many bulbs you need, and the page puts together the best-value bags.

Allium leaves often turn yellow while the plant is still flowering. So plant them between perennials that hide the foliage, or behind tulips that flower earlier. All bulbs come straight from the grower, and you decide how many you order.

Frequently asked questions

When should you plant allium bulbs?

Allium bulbs are planted in autumn, from October to mid-December, just like tulips and daffodils. The bulbs grow roots in autumn and then flower in May, June or July, depending on the variety.

How deep should you plant allium bulbs?

A rule of thumb is two to three times the height of the bulb. Large alliums such as Gladiator go about 15 to 20 centimetres deep, small varieties such as the drumstick allium about 8 to 10 centimetres. Choose a sunny spot where the soil does not stay wet.

Does allium come back every year?

Most alliums are hardy and flower for years in the same spot, especially in free-draining soil. In wet, heavy soil the bulbs can rot. Let the foliage die back after flowering before you remove it.

Is allium toxic to cats and dogs?

Yes, allium belongs to the onion family and is toxic to cats and dogs, both the bulb and the leaves. Keep the bulbs out of reach until you plant them and keep an eye on pets that like to dig.

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Allium bulbs

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Allium bulbs

Frequently asked questions

Why buy your plants from XXLplant

More than 300 large plants

Delivered safely

Fresh from the grower

Advice from plant experts