Crocosmia
Crocosmia spp
An ornamental plant, planted at any time of year.
In September: mulch the crocosmia. It can be planted now.
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Crocosmia, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant a pot-grown crocosmia. | usual | usual | usual | usual | usual | usual | usual | usual | usual | usual | usual | usual |
| Plant crocosmia corms. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Cut back the crocosmia. | none | none | usual | none | none | none | usual | none | none | none | none | none |
| Lift and divide the crocosmia. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Mulch the crocosmia. | usual | usual | usual | none | none | none | usual | usual | usual | none | none | none |
What to do, and when
The usual months for a UK garden. Your own plan gives the week.
Planting
Plant a pot-grown crocosmia at any time of year. Strong source: RHS.
Plant crocosmia corms March to May, 10cm deep, 10 to 20cm apart. Strong sources: RHS and Sarah Raven.
Cut back the crocosmia
Cut the old leaves and flower stems down to soil level.
Usually March, and November. Strong source: RHS.
Lift and divide the crocosmia
Every 3 to 5 years, not every year.
Usually March to May. Strong source: RHS.
Mulch the crocosmia
Spread a thick layer of well-rotted garden compost or manure to stop the soil drying out.
Usually March to May, and September to November. Strong source: RHS.
What the source words mean
Strong: the RHS page for this plant is among them.
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 “Crocosmia” comes from.