Ornamental Onion, Ornamental Garlic, Giant Onion, Giant Allium, Spring Bulbs, Spring Flowers
Perhaps the tallest of the ornamental onions, Allium giganteum is a bold and striking addition to the garden with its star-shaped, tiny lilac-purple flowers forming a 5-6 in. wide (12-15 cm) globe-shaped cluster. Blooming in late spring to early summer, this Giant Allium enjoys long-lasting blooms and remains ornamental in the garden well into summer. This bulbous perennial makes a perfect background plant that you may want to combine with finer-textured plants such as ornamental grasses. Great in fresh or dried flower arrangements too!
Hundreds of Allium species exist, but only a few have made a name for themselves as garden plants. The ornamental onions distinguish themselves by their remarkable diversity in color, inflorescence, and flowering height. Many species bloom in early summer – just after the spring-flowering period and just before the exuberant full bloom of summer. Certain small species are just perfect for a rock garden, and several lend themselves to naturalizing. All species can be used in the border.
| Hardiness |
6 - 10 |
|---|---|
| Heat Zones |
5 - 9 |
| Climate Zones | 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Bulbs |
| Plant Family | Amaryllidaceae |
| Genus | Allium |
| Common names | Giant Allium, Onion, Ornamental Onion |
| Exposure | Full Sun |
| Season of Interest |
Spring (Late) Summer (Early) |
| Height |
5' - 6' (150cm - 180cm) |
| Spread |
1' - 2' (30cm - 60cm) |
| Spacing | 8" (20cm) |
| Depth | 8" (20cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Chalk, Clay, Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Moist but Well-Drained, Well-Drained |
| Characteristics | Dried Arrangements, Cut Flowers, Fragrant, Plant of Merit, Showy |
| Tolerance | Drought, Deer, Rabbit |
| Attracts | Bees, Butterflies |
| Garden Uses | Beds And Borders |
| Garden Styles | Informal and Cottage, Formal Garden |
| Hardiness |
6 - 10 |
|---|---|
| Heat Zones |
5 - 9 |
| Climate Zones | 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Bulbs |
| Plant Family | Amaryllidaceae |
| Genus | Allium |
| Common names | Giant Allium, Onion, Ornamental Onion |
| Exposure | Full Sun |
| Season of Interest |
Spring (Late) Summer (Early) |
| Height |
5' - 6' (150cm - 180cm) |
| Spread |
1' - 2' (30cm - 60cm) |
| Spacing | 8" (20cm) |
| Depth | 8" (20cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Chalk, Clay, Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Moist but Well-Drained, Well-Drained |
| Characteristics | Dried Arrangements, Cut Flowers, Fragrant, Plant of Merit, Showy |
| Tolerance | Drought, Deer, Rabbit |
| Attracts | Bees, Butterflies |
| Garden Uses | Beds And Borders |
| Garden Styles | Informal and Cottage, Formal Garden |
How many Allium giganteum (Ornamental Onion) do I need for my garden?
| Plant | Quantity | |
|---|---|---|
| Allium giganteum (Ornamental Onion) | N/A | Buy Plants |
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Create a membership account to save your garden designs and to view them on any device.
Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
Join now and start creating your dream garden!
