Oneleaf Onion, American Onion, Allium grandisceptrum , Ornamental Onion, Spring Bulbs, Spring Flowers
Allium Unifolium (Oneleaf Onion) is a compact perennial with delicate clusters of up to 30 fairly large, star-shaped, satiny, rose-pink flowers. The blossoms are borne atop the foliage of short gray-green basal leaves. Blooming in late spring to early summer, this charming Allium spreads freely in the garden without being a pest.
Many hundreds of Allium species exist, but only a modest few have made a name for themselves as garden plants. The ornamental onions distinguish themselves by their great 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. All species can be used in the border. Certain small species are just perfect for a rock garden, and several lend themselves to naturalizing.
| Hardiness |
4 - 9 |
|---|---|
| Heat Zones |
1 - 9 |
| Climate Zones | 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Bulbs |
| Plant Family | Amaryllidaceae |
| Genus | Allium |
| Common names | Onion, Ornamental Onion |
| Exposure | Full Sun |
| Season of Interest | Spring (Late), Summer (Early) |
| Height | 1' - 2' (30cm - 60cm) |
| Spread | 3" - 4" (8cm - 10cm) |
| Spacing | 2" (5cm) |
| Depth | 4" (10cm) |
| 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 | Fragrant, Showy |
| Native Plants | United States, Pacific Northwest, California, Oregon |
| Tolerance | Deer, Rabbit |
| Attracts | Bees, Butterflies |
| Garden Uses | Beds And Borders |
| Garden Styles | Gravel and Rock Garden |
| Hardiness |
4 - 9 |
|---|---|
| Heat Zones |
1 - 9 |
| Climate Zones | 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Bulbs |
| Plant Family | Amaryllidaceae |
| Genus | Allium |
| Common names | Onion, Ornamental Onion |
| Exposure | Full Sun |
| Season of Interest | Spring (Late), Summer (Early) |
| Height | 1' - 2' (30cm - 60cm) |
| Spread | 3" - 4" (8cm - 10cm) |
| Spacing | 2" (5cm) |
| Depth | 4" (10cm) |
| 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 | Fragrant, Showy |
| Native Plants | United States, Pacific Northwest, California, Oregon |
| Tolerance | Deer, Rabbit |
| Attracts | Bees, Butterflies |
| Garden Uses | Beds And Borders |
| Garden Styles | Gravel and Rock Garden |
How many Allium unifolium (Oneleaf Onion) do I need for my garden?
| Plant | Quantity | |
|---|---|---|
| Allium unifolium (Oneleaf 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!
