Wintergreen barberry (Berberis julianae): when and how to prune

Wintergreen barberry (Berberis julianae): when to prune it?

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Prune after flowering, in June. If you want plenty of berries, prune lightly: they form on the branches that have flowered.

What else to prune in those months? June

Wintergreen barberry (Berberis julianae): how to prune it?

1. Trim a hedge into shape in June, a little narrower at the top than at the base, so that the bottom also gets light.
2. On a single shrub, remove a few old branches at the base every few years.
3. A neglected shrub can be cut back hard; it usually reshoots from old wood, though you lose a year of flowers.
4. Clear up the prunings straight away: the spines stay sharp for a long time, even in the lawn.

How much to cut, and how often?

• One pruning period a year: June.
• Prune in moderation: never remove more than about a third of the shrub at once.

What does it mean for wildlife?

• Pruning in June can fall in the nesting season (15 March–15 August). Check carefully for nesting birds first: disturbing an active nest is against the law.
• Wintergreen barberry (Berberis julianae) flowers in May–June, 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.
• 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

• Barberry
• Japanese barberry
• Darwin’s barberry (Berberis darwinii)
• Oregon grape
• Paleleaf barberry (Berberis candidula)
• Warty barberry (Berberis verruculosa)

Plant profile: Wintergreen barberry (Berberis julianae) · Pruning calendar and basic rules