Hydrangea Bloom Failure: Pruning Timing and Frost Pocket

Scenario

Three hydrangeas on east side of house. Old + 2 new. One new blooms; old and other new don't. All healthy growth.

Cause 1: Pruning at Wrong Time

Most hydrangeas bloom on old wood. Prune only right after spring bloom. Remove a few oldest canes then. Pruning now (fall/winter) removes flower buds.

Cause 2: East Side = Frost Pocket

Morning sun hits frozen buds → rapid thaw → cell rupture → bud death. North side is better: ground stays cold longer, buds swell later, past last frost.

New Reblooming Varieties

Endless Summer, Penny Mac, Mini Penny, Dooley, Blushing Bride bloom on old AND new wood—insurance against frost/pruning errors.

Action Plan

1. Don't prune now.
2. Move non-bloomers to north side if possible.
3. Plant reblooming varieties for reliable flowers.
4. Prune only after spring bloom (remove oldest canes).