Photo: Elbert L. Little, Jr., USGS, Public domain · source
Pruning guide · Tree
Eastern hemlock: when and how to prune
Tsuga canadensis
Eastern hemlock is best pruned in June and August.
| Pruning months | June and August |
|---|---|
| Nesting season (15 March–15 August) | Take care in June and August |
| Native to Belgium | No, planted |
Eastern hemlock: when to prune it?
A freely growing tree needs no pruning. Trim a hedge in June and again at the end of August.
Eastern hemlock: how to prune it?
- Trim the hedge slightly narrower at the top than at the base, so the lower branches also get light.
- Cut within the green, needled part and not back into bare old wood: it regrows poorly from there.
- On a young tree, leave the nodding leader alone: it straightens up by itself and forms the new top.
- Remove dead and damaged branches at any time of year.
How much to cut, and how often?
- There are 2 pruning periods a year: June and August. You don’t have to prune in every one.
- Never remove more than about a quarter of the crown at once. Better a little every year.
What does it mean for wildlife?
- Pruning in 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.
- 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.
- Leaving a stub or sawing flush with the trunk: cut just outside the branch collar.
Caution: Do not trim on hot, sunny days, as freshly cut needles scorch easily. Do not prune later than early September, so new growth can harden before winter.
Nearby: related pruning guides
Plant profile: Eastern hemlock · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.