Mountain laurel (Kalmia latifolia): when and how to prune

Mountain laurel (Kalmia latifolia): when to prune it?

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It hardly needs pruning. In June–July, after flowering, remove the spent clusters and prune lightly if needed.

What else to prune in those months? June · July

Mountain laurel (Kalmia latifolia): how to prune it?

1. Snap or cut off the spent clusters just above the new shoots.
2. After flowering, cut an overlong or lopsided branch back to just above a rosette of leaves.
3. Remove dead or damaged branches back to healthy wood.

How much to cut, and how often?

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

What does it mean for wildlife?

• Pruning in June–July can fall in the nesting season (15 March–15 August). Check carefully for nesting birds first: disturbing an active nest is against the law.
• Mountain laurel (Kalmia latifolia) 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

• Sheep laurel (Kalmia angustifolia)
• Barberry
• Blackthorn
• Box (buxus)
• Californian lilac
• Cherry laurel

Plant profile: Mountain laurel (Kalmia latifolia) · Pruning calendar and basic rules