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Hydrangea Tree Leafs Out Late After Improper Pruning

Pruning at the Wrong Time Removes Buds

A Chicago (zone 5) hydrangea tree pruned in spring before leaf-out likely lost its flower buds. Hydrangeas bloom on old wood; prune only after flowering.

Additional Factors

Late spring freezes can also kill buds.
Wait and observe; the plant may still leaf out vegetatively.
Do not prune again until after any potential bloom period.

Expert Resource

Why Hydrangeas Won't Bloom.

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