Osier (Salix viminalis)

Photo: Wikimedia Commons, CC BY-SA 3.0 · source

Pruning guide · Shrub

Osier: when and how to prune

Salix viminalis

Osier is best pruned in December–March.

Key facts
Pruning monthsDecember–March
Nesting season (15 March–15 August)Take care in March
FloweringMarch–April
Good for bees, butterflies and birdsYes, for bees, butterflies and birds
Native to BelgiumYes

Osier: when to prune it?

While dormant in winter, from December to March.

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

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

Osier: how to prune it?

  1. Coppice or pollard it every one to three years, just above the ground or the pollard head: this gives long, straight rods.
  2. Use the rods fresh for weaving, or let them dry and soak them in water for a few days before use.
  3. If you would rather have a shrub than coppice, just remove a few old branches each year.

How much to cut, and how often?

  • One pruning period a year: December–March.
  • Can be cut back to just above the ground every few years and will then regrow.
  • Prune in moderation: never remove more than about a third of the shrub at once.

What does it mean for wildlife?

  • Pruning in March can fall in the nesting season (15 March–15 August). Check carefully for nesting birds first: disturbing an active nest is against the law.
  • Osier flowers in March–April, when it attracts bees.
  • If pruning falls during flowering, wait until it is over or leave part of the plant to flower, so bees and butterflies still benefit.
  • Host plant: caterpillars of butterflies or moths eat the leaves.
  • 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

  • Clipping without first checking for nesting birds.
  • Leaving a stub or sawing flush with the trunk: cut just outside the branch collar.

Caution: Don’t prune during the nesting season (mid-March to mid-August) if birds are nesting in the shrub.

Nearby: related pruning guides

Similar to: Difference from white willow · Difference from purple willow · Difference from goat willow · Difference from sea buckthorn · Difference from creeping willow

Plant profile: Osier · Pruning calendar and basic rules

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

Laden…