English oak: when and how to prune

Quercus robur

English oak is best pruned in July–August and November–February.

Updated on 12 October 2026

Key facts
Pruning months	July–August and November–February
Nesting season (15 March–15 August)	Take care in July–August
Flowering	April–May
Good for bees, butterflies and birds	Yes, for butterflies and birds
Native to Belgium	Yes

English oak: when to prune it?

Dead, diseased and broken branches can be removed at any time of year. Formative pruning in winter or summer, not during leaf-out in spring.

What else to prune in those months? January · February · July · August · November · December

An oak grows best when left alone: prune as little as possible.
Train a young tree on a single leader; gradually remove competing leaders and branches that hang too low.
Cut large branches in three steps, just outside the branch collar.
Keep old trees with dead wood where it is safe: it is valuable for wildlife.

There are 2 pruning periods a year: July–August and November–February. You don’t have to prune in every one.
Grows best when left alone. Only remove dead, diseased or awkward branches.

Pruning in July–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.
Host plant: caterpillars of butterflies or moths eat the leaves.
In September–October birds eat the fruit: leave some on the plant or on the ground.
As a native plant, it feeds more insects than a non-native species.
Prunings can go on a dead hedge or brash pile in a corner of the garden: shelter for hedgehogs, wrens and insects.

Clipping without first checking for nesting birds.
Pruning too much: it grows best when left alone.
Leaving a stub or sawing flush with the trunk: cut just outside the branch collar.

Caution: Spotted nests of the oak processionary caterpillar? Don’t prune yourself; have them removed professionally.

This guide is compiled from the Bladwijzer plant profile and pruning calendar.