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Photo by Michal Maňas

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Allium unifolium

Also Known As

One-Leaf Onion
Ornamental Onion

Plant type

perennial, bulb / corm / tuber

size

H: 18"-30"
W: 2"-24"

planting zones

4a-11

More Options

Allium unifolium plant details

Allium unifolium is a broadleaf deciduous perennial bulb / corm / tuber with green foliage. In spring and summer lavender, pink and white flowers emerge. Features grassy texture. Attracts bees, beneficial insects and butterflies making it an excellent addition to pollinator gardens. Grows well with sun - mostly sun and regular - low water. Drought tolerant once established. Prefers to be dry in summer, dry when dormant. Adapts to various soil conditions. Does well in acidic, alkaline, average, clay, gritty, lean, rich and well-drained soil. A good option if you're seeking something verticillium wilt resistant.

CHARACTERISTICS OF Allium unifolium

Plant type: perennial bulb / corm / tuber
Plant family: amaryllidaceae
Foliage: deciduous green
Mature size: 2 IN - 24 IN - wide, 18 IN - 30 IN - tall
Flowers: lavender, pink and white blooms in spring and summer
Uses: border plant, cutting garden, dried-arrangements, rock garden

GROWING CONDITIONS for Allium unifolium

USDA Zones: 4a - 11
Sun exposure: sun - mostly sun
Watering frequency: regular - low
Resistant to: deer and rabbit, verticillium wilt
Soil needs: acidic, alkaline, average, clay, gritty, lean, rich and well-drained

Nursery contributed plant descriptions

Lavender-purple stars cluster on somewhat short stems.

By: Dancing Oaks Nursery

Blooms May-July with white to pink flowers. Clumps of grass-like leaves through the winter and spring.

By: Cactus Jungle

The name Unifolium refers to the single leaf of this Native Californian Species. Lovely lavender pink flowers! These golden yellow star shaped flowers are excellent for rock gardens. Once established, they spread rapidly. Alliums offer a wide diversity of color, height, and blooming times. They will tolerate a poor garden soil; once established will naturalize easily. Alliums are resistant to deer. They make excellent cut flowers. Plant them around rose bushes to repel spring aphids. The uses are endless, and at this price, you can afford to experiment! Zones 4-9. 5+ cm round bulbs---huge, many ready to split!

By: Edens Blooms

Garden photo gallery of Allium unifolium

Photo of Allium unifolium flower by Michal Maňas

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By: Michal Maňas

This file is licensed under the Creative Commons Attribution 2.5 Generic license.

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Gardening facts about Allium unifolium plant

How to Grow Allium unifolium

Sun Exposure
- sun - mostly sun
Water Needs
- regular - drought tolerant
Water Needs
- dry when dormant
Water Needs
- dry in summer
Soil Needs
- clay
- acidic
- alkaline
- adaptable
- average
- lean
- well-drained
- rich
- gritty
Special Situation
- verticillium wilt resistant

Features

Foliage Color
- green
Flower Color
- white
- pink
- lavender
Wildlife
- beneficial insects
- bees
- butterflies
- deer resistant
- rabbit resistant
Flower Season
- summer
- spring
Foliage Season
- deciduous
Texture
- grassy