18 Best Allium Varieties | Ornamental Onion Types

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Discover the names of 18 Best Allium Varieties in this article. These stunning ornamental onion types can be grown in containers as well!

Allium genus has many species to choose from. To make it easy for you, we have selected the Most Popular Allium Varieties with the best blend of colors and charm that will surely add a lot of appeal to your garden!

Check out the best flowers that attract butterflies to the garden here

Best Allium Varieties

1. Moly

Botanical Name: Allium ‘Moly’

Zones: 3-9

Size: 12-18 inches tall

Also known as lily leek, this beautiful Allium is loved for yellow flowers that bloom from late spring to mid-summer. It prefers full sun to partial shade and well-draining soil.

2. Blue Allium

Botanical Name: Allium caeruleum

Zones: 4-8

Size: 18-24 inches tall

This showy small onion features sky blue flowers in a 1-2 inch ball-like cluster. It looks wonderful in beds, borders, meadows, and rock gardens. The plant favors full sun and well-draining soil.

3. Pink Lily Leek

Botanical Name: Allium oreophilum

Zones: 4-11

Size: 14-20 inches tall

This short Allium type produces charming magenta florets that create loose flower heads. When grown in masses, it forms beautiful scenery. Plant it in full sun and well-draining soil.

4. Globemaster


Botanical Name: Allium ‘Globemaster’

Zones: 5-8

Size: 24-48 inches tall

This tall Allium variety is planted for its light purple showy 6-8 inches wide flower heads. Grow the plant in the full sun using well-draining soil.

5. Purple Sensation


Botanical Name: Allium hollandicum ‘Purple Sensation’

Zones: 4-9

Size: 18-36 inches tall

‘Purple Sensation’ produces 4-5 inches wide globes of striking purple-violet blooms that grow on 24-30 inch stalks. Plant the bulbs in full sun to part shade in well-draining soil.

6. Star of Persia

Best Allium Varieties 4

Botanical Name: Allium cristophii

Zones: 4-8

Size: 16-28 inches tall

Star of Persia produces 90-100 individual small blooms in one flower head. The light purple blossoms can reach up to 10-12 inches in diameter.

7. Millenium

Botanical Name: Allium ‘Millenium’

Zones: 5-8

Size: 10-14 inches tall

This long flowering variety blooms in late summer with light purple blossoms of 2-3 inches wide heads that drift above the mound of shiny green leaves. You can grow it in cottage gardens and mixed borders.

8. Turkistan Onion

Best Allium Varieties 5

Botanical Name: Allium karataviense

Zones: 4-8

Size: 10-14 inches tall

The foliage of this species is as pretty as its flowers! It looks great when grown in groups in window boxes, containers, rock gardens, and border fronts.

9. Drumstick

Botanical Name: Allium sphaerocephalon

Zones: 3-10

Size: 3 feet tall

This Allium is also known as round-headed garlic and offers red-purple, egg-shaped flower heads that contain a tight cluster of little rose-purple florets. Grow it in large groups in open woodland areas, rock gardens, containers, beds, and borders.

10. Three-Cornered Leek

Best Allium Varieties 6

Botanical Name: Allium triquetrum

Zones: 3-8

Size: 14-20 inches tall

It blooms in spring with delicate, pendulous white flowers on triangular stems, hence the name. You can also plant it in your vegetable garden along with carrots, roses, chamomile, and beets.

11. Mount Everest

Best Allium Varieties 7

Botanical Name: Allium ‘Mount Everest’

Zones: 4-8

Size: 24-36 inches tall

As the name sounds, ‘Mount Everest’ features 5-6 inches wide heads of bright white blooms on tall stalks. For best visual effect, plant at least 10-15 bulbs together in a group. It looks great with peonies, delphiniums, or irises.

12. Crow Garlic Hair


Botanical Name: Allium vineale ‘Hair’

Zones: 3-8

Size: 18-28 inches tall

This Allium variety produces flowers with a purple center and green, hair-like elongations. Its extraordinary appearance brings texture to beds and borders.

13. Gladiator

Botanical Name: Allium ‘Gladiator’

Zones: 4-10

Size: 36-48 inches tall

It is one of the tallest allium varieties you can grow that looks spectacular with its pom-pom flowers. The flowers are also quite potent in attracting butterflies!

14. Giant Onion

Botanical Name: Allium giganteum

Zones: 4-8

Size: 36-54 inches tall

This allium got its name due to the large globe of tiny florets that look smashing in a purple-blue hue. It is one of the best backdrop plants you can grow in the garden for long-lasting blooms!

15. Allium Red Mohican

Botanical Name: Allium ‘Red Mohican’

Zones: 4-9

Size: 24-36 inches tall

This allium type has beautiful maroon-red flowers with very tiny white petals on the top, which looks like a Mohican, hence the name.

16. German Garlic

Botanical Name: Allium Senescens

Zones: 3-7

Size: 10-18 inches tall

This ornamental onion has grassy leaves with lilac-purple flowers. The plant is one of the best contenders for a rock garden. It also attracts butterflies and hummingbirds!

17. Ornamental Onion

Botanical Name: Allium atropurpureum

Zones: 4-10

Size: 24-36 inches tall

One of the prettiest on this list, it has deep purple flowers with blueberry ‘eyes.’ It looks stunning in flower beds and borders. For the best display, grow it with ‘Gladiator.’

Honorable Mention

18. Sicilian Honey Garlic


Botanical Name: Nectaroscordum siculum

Zones: 5-10

Size: 36-48 inches tall

This variety is not Allium but a close relative that is sold as one. It offers bell-shaped flowers with red-purple markings. Grow it in full sun and well-draining soil.

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