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Pruning guide · Herb
Hyssop: when and how to prune
Hyssopus officinalis
Hyssop is best pruned in April and September.
| Pruning months | April and September |
|---|---|
| Flowering | July–September |
| Good for bees, butterflies and birds | Yes, for bees and butterflies |
| Native to Belgium | No, planted |
Hyssop: when to prune it?
Do the main prune in April, when the new buds become visible. In September, cut off the spent flower spikes.
Hyssop: how to prune it?
- In April, cut last year’s shoots back to a few centimetres above the old wood, just above a few new buds.
- This keeps the bush compact and well branched.
- Remove dead and frost-damaged shoots completely.
- Prune a hedge the same way, and trim it lightly into shape in September, after flowering.
How much to cut, and how often?
- There are 2 pruning periods a year: April and September. You don’t have to prune in every one.
What does it mean for wildlife?
- Hyssop flowers in July–September, 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: Do not cut into bare old wood: hyssop is slow to regrow from it. Do not prune late in autumn either, as young shoots would be frosted.
Nearby: related pruning guides
This guide is compiled from the Bladwijzer plant profile and pruning calendar.