How to grow alliums
Find out all you need to know about growing alliums, or ornamental onions, in this Grow Guide.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 not 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 |
| Cut back | ||||||||||||
| Cut back |
J
Do not Cut back in January |
F
Do not Cut back in February |
M
Do not Cut back in March |
A
Do not Cut back in April |
M
Do not Cut back in May |
J
Do Cut back in June |
J
Do Cut back in July |
A
Do not Cut back in August |
S
Do not Cut back in September |
O
Do not Cut back in October |
N
Do not Cut back in November |
D
Do not Cut back in December |
Alliums are often referred to as ornamental onions. Within their group there’s a tremendous variation of flower size.
The often globe-shaped flowers appear in May or June. Depending on which type you grow they are purple, white or yellow in colour. The flowers of these hardy plants follow the foliage, which can look messy as the plants flower. This is why they are seldom grown in containers. In a border the faded foliage can be disguised by neighbouring plants.
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Offers
'Concorde' is a very heavy cropping variety and will keep for over two months when picked unripe. It is self-fertile and grown on dwarfing rootstock, so it’ll always be compact.
Offer Ends:
Treat yourself to some beautiful ornamental grasses and receive a free allium collection of 100 bulbs, worth more than £48, with your order.
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Enjoy months of blooms, year after year, with our plant of the week, perennial sweet peas. You'll receive 15 plants of three varieties for only £18.
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