Short answer
Reduce a hedge’s height in stages, from late winter, after checking for nests. Broadleaf hedges tolerate a hard reduction; conifers (except yew) do not regrow from bare wood, so never cut a conifer hedge below its green growth.
Step by step
- Decide your target height and stretch a string line.
- Check for nests.
- Reduce the top in stages: no more than about a third at a time for conifers.
- Work safely: use stable access, not a leaning ladder.
- Clear the clippings and give the hedge time to recover.
Reach and access
For tall hedges, a pole hedge trimmer reduces the need for ladders. See long reach hedge trimmers. Always follow the manufacturer’s instructions for working at height.
Which hedges tolerate hard reduction?
- Yes: beech, hornbeam, privet, laurel, hawthorn, yew.
- No: most other conifers, including leylandii.
Check for nests before you start; see our nesting season guide.