When to plant and prune Hardy Geranium (Cranesbill)
Hardy Geranium (Cranesbill) flowers from late May to late August and the dates below cover planting, flowering and the pruning window.
Planting, flowering and pruning by region
Hardy Geranium (Cranesbill) is grown to the calendar rather than to the frost, so the same dates apply across the whole UK and every region below reads the same. Where a plant’s timings do follow the frost, Plot shifts them from the Midlands and Lowland Wales baseline using Met Office average frost dates.
| Where you are | Plant | In flower | Prune |
|---|---|---|---|
| South West Coast and Cornwall | late March to mid May | late May to late August | late June to mid July |
| South Coast and Channel | late March to mid May | late May to late August | late June to mid July |
| Greater London (Urban Heat Island) | late March to mid May | late May to late August | late June to mid July |
| South East and Home Counties | late March to mid May | late May to late August | late June to mid July |
| East Anglia | late March to mid May | late May to late August | late June to mid July |
| Midlands and Lowland Wales | late March to mid May | late May to late August | late June to mid July |
| Wales and West Coast | late March to mid May | late May to late August | late June to mid July |
| Northern England | late March to mid May | late May to late August | late June to mid July |
| Scotland Lowlands and Central Belt | late March to mid May | late May to late August | late June to mid July |
| Scotland Highlands and Islands | late March to mid May | late May to late August | late June to mid July |
| Northern Ireland | late March to mid May | late May to late August | late June to mid July |
| Channel Islands and Isle of Man | late March to mid May | late May to late August | late June to mid July |
Growing notes
The 'Hampton hack' (cutting the whole clump to the ground in June/July after the first flush) rejuvenates foliage and often triggers a second wave of flowers by early autumn.
At a glance
- Spacing
- 40 cm between plants
- Eventual height
- 45 cm
- Eventual spread
- 60 cm
- Hardiness
- H6
- Sun
- Partial
- Frost tender
- No
- Grows in a container
- Yes, 10 litres or more
- Balcony rating
- 4 out of 5
Pruning group
'Hampton hack' — cut whole plant back to ground level after first flowering flush
What usually goes wrong
- powdery mildew in dry conditions
- vine weevil in containers
Related guides
Timings cross-checked against RHS guidance for hardy geranium (cranesbill).