Reviving Sparse, Weak 'Endless Summer' Hydrangeas in Michigan

Three 'Endless Summer' hydrangeas + hydrangea tree, 3rd summer, planted by pros. Sparse, thin branches, ugly flowers. Never fertilized. Cut back twice in fall (thought it'd thicken).

Problems Identified

• Fall pruning = NO FLOWERS. Hydrangeas bloom on OLD wood. Fall cuts remove next year's buds.
• Full sun + dry = stress. They prefer dappled shade + lots of water.

Recovery Plan

1. Water deeply especially in dry spells.
2. May: balanced liquid fertilizer for quick root uptake.
3. Mulch 2 ft wide with well-rotted organic matter (horse manure best).
4. STOP PRUNING for a while. Let them rebuild flower buds.

If small/young + full sun → consider moving to shade. Otherwise, fix culture and wait.