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Pruning guide · Shrub
Japanese holly: when and how to prune
Ilex crenata
Japanese holly: as a hedge or grown freely, prune in May–June and August–September.
| Pruning months | May–June and August–September |
|---|---|
| Nesting season (15 March–15 August) | Take care in May–June and August |
| Flowering | May–June |
| Native to Belgium | No, planted |
Japanese holly: when to prune it?
In May–June and in August–early September.
What else to prune in those months? May · June · August · September
Japanese holly: how to prune it?
- Trim in overcast weather, so that the cut leaves don’t scorch in the sun.
- For a crisp shape, trim twice a year; once is enough for a looser hedge.
- It also sprouts from older wood: a plant that has grown too big or bare can be cut back hard.
How much to cut, and how often?
- Trim a hedge once or twice a year, after the first flush of growth (late June) and, if needed, in late summer. Check first that no birds are nesting.
What does it mean for wildlife?
- Pruning in May–June and August can fall in the nesting season (15 March–15 August). Check carefully for nesting birds first: disturbing an active nest is against the law.
- A dense hedge gives birds a place to nest and shelter, and hedgehogs take cover underneath. Leave some leaves at the base.
- Prunings can go on a dead hedge or brash pile in a corner of the garden: shelter for hedgehogs, wrens and insects.
Common mistakes
- Clipping without first checking for nesting birds.
- Letting the hedge grow wider at the top than at the bottom: the base then goes bare.
Caution: Don’t trim after early September: the new shoots still need to harden off before the frost.
Nearby: related pruning guides
Similar to: Difference from box · Difference from holly
Plant profile: Japanese holly · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.