American onion

Allium unifolium

American onion - Allium unifolium

Common Name: American onion
Genus: Allium
Species: unifolium

Category: Bulbs, Corms, Tubers & Rhizomatous Plants
Growth Rate: Average
Features: Makes good cut flowers, Has interesting foliage, Suitable for growing in containers, Good for a rock garden

Hardiness: Half-HardyHeight: 0.30 m (30 cm)
Sun/Shade: Full sunSpread: 0.05 m (5 cm)

Foliage Type: DeciduousFlower Colour: Purple, Pink
Foliage Colour: GreenFlowering Period: May to July

Soil Type: Normal/Loam or Sandy/Light or Chalky/Alkaline
Soil Moisture: Dry, well drained

The flowers on this Allium are quite papery which means they last longer than many of the other varieties. In spring the first sign of growth is the appearance of the strappy foliage. This has usually died off by the time the flowers appear in late spring. The pinky-purple bell shaped flowers emerge in clusters of up to 20 at a time on top of single stems. A great plant for an alpine bed or to add colour to the front of a mixed border.

  • Garden care: Plant bulbs 5cm deep and 5cm apart in clumps or drifts. Avoid excessive soil moisture and split and divide large clumps in autumn or spring.

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