Photo: Hectonichus, CC BY-SA 3.0 · source
Pruning guide · Perennial
Purple gromwell: when and how to prune
Buglossoides purpurocaerulea
Purple gromwell is best pruned in June–July.
| Pruning months | June–July |
|---|---|
| Flowering | April–June |
| Good for bees, butterflies and birds | Yes, for bees |
| Native to Belgium | No, planted |
Purple gromwell: when to prune it?
After flowering, in June–July, cut back the faded stems and any overlong shoots. In March, clear away dead stems.
Purple gromwell: how to prune it?
- Cut faded flower stems back to just above the foliage.
- Shorten shoots that go too far or grow over other plants; rooted pieces can be potted up or given away.
- In March, remove dead stems and old leaves, so the new foliage has room.
How much to cut, and how often?
- One pruning period a year: June–July.
What does it mean for wildlife?
- Purple gromwell flowers in April–June, when it attracts bees.
- If pruning falls during flowering, wait until it is over or leave part of the plant to flower, so bees and butterflies still benefit.
Caution: It spreads quickly by rooting shoots and can smother smaller plants: give it a spot where it is allowed to spread.
Nearby: related pruning guides
Plant profile: Purple gromwell · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.