- Botanical name: Allium cowanii
- Common name: Ornamental onion
- Family: Alliaceae
- Plant Type: Bulb
White
Green
- Key features:
- Attractive seedheads
- Attractive to wildlife
- Flowers
- Prefers rich soil
Allium cowanii is an early flowering allium, bearing pretty, shaggy white flower heads in loose clusters. The flowers last well and are perfect for cutting. It’s well suited to growing in drifts at the front of an informal boxer, but also works well when grown in pots.
For best results, grow Allium cowanii in well-drained soil in full sun. Plant bulbs in fertile, well-drained soil up to three times their diameter.
How to grow Allium cowanii
-
Plant size
40cm height
10cm spread
-
Aspect
South facing, west facing
-
Position in border
Front, middle
- Sun exposure: Full sun
- Soil type: Well drained / light / sandy / clay / heavy / moist / chalky / alkaline
Plant calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow | ||||||||||||
| Sow |
J
Do not Sow in January |
F
Do not Sow in February |
M
Do Sow in March |
A
Do Sow in April |
M
Do not Sow in May |
J
Do not Sow in June |
J
Do not Sow in July |
A
Do not Sow in August |
S
Do not Sow in September |
O
Do not Sow in October |
N
Do not Sow in November |
D
Do not Sow in December |
| Plant | ||||||||||||
| Plant |
J
Do not Plant in January |
F
Do not Plant in February |
M
Do not Plant in March |
A
Do not Plant in April |
M
Do not Plant in May |
J
Do not Plant in June |
J
Do not Plant in July |
A
Do not Plant in August |
S
Do Plant in September |
O
Do Plant in October |
N
Do Plant in November |
D
Do not Plant in December |
| Flowers | ||||||||||||
| Flowers |
J
Plant does not flower in January |
F
Plant does not flower in February |
M
Plant does not flower in March |
A
Plant does not flower in April |
M
Plant does flower in May |
J
Plant does flower in June |
J
Plant does not flower in July |
A
Plant does not flower in August |
S
Plant does not flower in September |
O
Plant does not flower in October |
N
Plant does not flower in November |
D
Plant does not flower in December |
| Divide | ||||||||||||
| Divide |
J
Do not Divide in January |
F
Do not Divide in February |
M
Do not Divide in March |
A
Do not Divide in April |
M
Do not Divide in May |
J
Do not Divide in June |
J
Do not Divide in July |
A
Do not Divide in August |
S
Do Divide in September |
O
Do Divide in October |
N
Do Divide in November |
D
Do not Divide in December |
| Collect seeds | ||||||||||||
| Collect seeds |
J
Do not Collect seeds in January |
F
Do not Collect seeds in February |
M
Do not Collect seeds in March |
A
Do not Collect seeds in April |
M
Do not Collect seeds in May |
J
Do not Collect seeds in June |
J
Do not Collect seeds in July |
A
Do not Collect seeds in August |
S
Do Collect seeds in September |
O
Do Collect seeds in October |
N
Do not Collect seeds in November |
D
Do not Collect seeds in December |
Allium cowanii and wildlife
Allium cowanii is known for attracting bees, butterflies/moths and other pollinators. It has nectar/pollen rich flowers.
Attractive to Bees
Does not attract Beneficial insects
Does not attract Birds
Attractive to Butterflies/Moths
Attractive to Other pollinators
Is Allium cowanii poisonous?
Allium cowanii can be toxic.
Toxic to Cats
Toxic to Dogs
Toxic to Horses
No reported toxicity to Birds
No reported toxicity to Livestock
No reported toxicity to People
Plants that go well with Allium cowanii
