Allium cowanii
Bulbous perennial to 40cm tall, producing narrow, grass-like leaves, and flowerheads, comprising loose umbels of pure white stars, in late spring and early summer
0.1-0.5 metres
0-0.1 metre
| Season | Stem | Flower | Foliage | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
Easy to grow in mild areas in fertile well-drained soil. Add grit when grown in clay soils to improve drainage. Alternatively grow in a container and protect over winter. See allium cultivation
Propagate by offsets which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation
No pruning required, other than to remove old flowered stems and foliage
May be susceptible to allium leaf miner and onion fly
May be susceptible to onion white rot, and onion downy mildew
