Ornamental allium
Allium
An ornamental plant, planted September to October, or sown March to May.
In September: nothing to do. It can be planted now.
Add ornamental allium to my plot
Your first month is free. No card. Then £4.99 a month or £39.99 a year. You sign in with a link we email you, with no password.
Ornamental allium, month by month
Bar: the usual months. Sprout: this month.
| Sowing, planting or job | Sep | Oct | Nov | Dec | 2027Jan | Feb | Mar | Apr | May | Jun | Jul | Aug |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow under cover. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Plant ornamental allium bulbs. | usual | usual | none | none | none | none | none | none | none | none | none | none |
| Lift and divide the ornamental allium. | none | none | usual | none | none | none | usual | none | none | none | none | none |
| Feed the ornamental allium. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Clear away the dead ornamental allium stems and leaves. | none | none | none | none | none | none | none | none | none | usual | none | none |
What to do, and when
The usual months for a UK garden. Your own plan gives the week.
Sowing and planting
Sow under cover March to May, 5mm deep. Moderate source: RHS.
Plant ornamental allium bulbs September to October, 15cm deep, 7.5 to 20cm apart. Moderate sources: RHS and Gardeners’ World.
Lift and divide the ornamental allium
Every 4 to 5 years, not every year.
Usually March, and November. Moderate source: Gardeners’ World.
Feed the ornamental allium
Use a potash-rich fertiliser.
Usually March to May. Moderate source: J Parker’s.
Clear away the dead ornamental allium stems and leaves
The leaves die down at flowering time; remove them as they die back, with no ill effects. From RHS.
Usually June. Moderate source: Harts Nursery.
What the source words mean
Moderate: another trusted UK source, or the RHS on its group.
Add ornamental allium to my plot
Every line above names the page it comes from. Where we found no good source for a job, we left it out. Where the name “Ornamental allium” comes from.