Bellflower
Campanula
An ornamental plant, planted April to October, or sown March to June.
In September: lift and divide the bellflower. It can be planted out or planted now.
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Bellflower, 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 |
| Sow outdoors. | none | none | none | none | none | none | none | none | usual | usual | none | none |
| Plant out. | usual | usual | none | none | none | none | none | none | none | none | none | none |
| Plant a pot-grown bellflower. | usual | usual | none | none | none | none | none | usual | usual | usual | usual | usual |
| Lift and divide the bellflower. | usual | none | none | none | none | none | usual | usual | usual | none | none | none |
| Stake the bellflower. | none | none | none | 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.
Sowing and planting
Sow under cover March to May, 5mm deep. Moderate sources: RHS and Mr Fothergill’s.
Sow outdoors May to June, 5mm deep. Moderate source: Mr Fothergill’s.
Plant out September to October, 23cm apart. Moderate source: Mr Fothergill’s.
Plant a pot-grown bellflower April to October, 30 to 50cm apart. Moderate sources: J Parker’s and Farmer Gracy.
Lift and divide the bellflower
Every 3 years, not every year.
Usually March to May, and September. Moderate source: RHS.
Stake the bellflower
Let the clump grow up through netting or a round grid support frame.
Usually March to May. Moderate source: RHS.
What the source words mean
Moderate: another trusted UK source, or the RHS on its group.
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 “Bellflower” comes from.