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Pruning guide · Perennial
Alpine aster: when and how to prune
Aster alpinus
Alpine aster is best pruned in July.
| Pruning months | July |
|---|---|
| Flowering | May–July |
| Good for bees, butterflies and birds | Yes, for bees and butterflies |
| Native to Belgium | No, planted |
Alpine aster: when to prune it?
After flowering, in July, cut the flower stems back to the rosette.
What else to prune in those months? July
Alpine aster: how to prune it?
- During flowering, regularly remove faded flowers, stem and all.
- After flowering, cut all the flower stems back to the leaf rosette.
- Leave the rosette in place over winter; in March, just remove dead leaves.
How much to cut, and how often?
- One pruning period a year: July.
What does it mean for wildlife?
- Alpine aster flowers in May–July, 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.
Nearby: related pruning guides
Plant profile: Alpine aster · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.