River birch: when and how to prune

River birch: when to prune it?

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Prune as little as possible; if needed, in August, when the leaves are fully grown.

What else to prune in those months? August

River birch: how to prune it?

1. Remove dead, damaged and crossing branches.
2. Cut small branches just outside the branch collar, never flush with the trunk.
3. On a multi-stemmed tree, keep 3–5 strong, well-spaced stems and remove other protruding wood.
4. Never remove more than a fifth of the crown in one year.

How much to cut, and how often?

• One pruning period a year: August.
• 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 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.

Nearby: related pruning guides

• Downy birch
• Himalayan birch
• Paper birch
• Silver birch
• Yellow birch
• Dwarf birch

Plant profile: River birch · Pruning calendar and basic rules