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Pruning guide · Perennial
Large self-heal: when and how to prune
Prunella grandiflora
Large self-heal is best pruned in March and August.
| Pruning months | March and August |
|---|---|
| Flowering | June–August |
| Good for bees, butterflies and birds | Yes, for bees and butterflies |
| Native to Belgium | No, planted |
Large self-heal: when to prune it?
In August after flowering and in March as a tidy-up.
Large self-heal: how to prune it?
- Cut off faded spikes in August, just above the foliage.
- If the plant has become untidy or patchy, cut it back after flowering to about 5 cm above the ground: fresh foliage will follow.
- In March remove old, brown leaves and cut off runners that stray too far.
How much to cut, and how often?
- There are 2 pruning periods a year: March and August. You don’t have to prune in every one.
What does it mean for wildlife?
- Large self-heal flowers in June–August, when it attracts bees and butterflies.
- 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 by runners and by self-seeding. In small borders or next to weak plants, keep it in check by cutting off the spikes and severing the runners.
Nearby: related pruning guides
Plant profile: Large self-heal · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.