Blue Hydrangeas Not Blooming: Root Pruning to Shift Energy

Why Leaves But No Flowers

Excess vegetative growth from high nitrogen or ideal conditions suppresses flowering.

Technique: Root Pruning

1. Cut a semicircle 12–18 inches from base, 10–12 inches deep with sharp spade.
2. This severs some roots, signaling plant to set buds.

Additional Steps

• Switch to low-nitrogen fertilizer.
• Do not prune top this year.
• Wrap in burlap to protect buds.