Dutch elm (Ulmus × hollandica)

Photo: Wouter Hagens at Dutch Wikipedia, CC BY-SA 3.0 · source

Pruning guide · Broadleaf tree

Dutch elm: when and how to prune

Ulmus × hollandica

Dutch elm is best pruned in November–February.

Key facts
Pruning monthsNovember–February
Nesting season (15 March–15 August)Outside it
FloweringMarch
Native to BelgiumYes

Dutch elm: when to prune it?

Only in winter (November–February).

Prune while dormant, from November to March, but not in freezing weather.

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

Dutch elm: how to prune it?

  1. In spring and summer, fresh pruning wounds attract the elm bark beetle: so never prune during the growing season.
  2. Give a young tree a single central leader and raise the crown of an avenue tree gradually.
  3. Remove diseased branches, burn or shred them, and disinfect your tools.

How much to cut, and how often?

  • One pruning period a year: November–February.
  • Never remove more than about a quarter of the crown at once. Better a little every year.

What does it mean for wildlife?

  • The pruning months fall outside the nesting season (15 March–15 August), so you won’t disturb nesting birds.
  • 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.

Common mistakes

  • Leaving a stub or sawing flush with the trunk: cut just outside the branch collar.

Caution: Don’t stack elm firewood with the bark still on: the elm bark beetle breeds in the bark of dead elm wood.

Nearby: related pruning guides

Similar to: Difference from field elm · Difference from wych elm

Plant profile: Dutch elm · Pruning calendar and basic rules

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

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