Coffee and Tea on Hydrangeas: Not the Cause of Decline

Question: Poured coffee/tea daily for a week to blue hydrangea blooms. Now leaves burnt/drooping, new bloom drooping. Can I save it?

Real Culprit

Coffee/tea not the cause—a week is too short for pH change effects, and pH likely didn't shift much. Most likely: water issue (too much or too little gives same symptoms). Water thoroughly, check root ball with finger. Hydrangeas have high leaf evaporation—on hot days, leaves wilt/burn even with adequate soil moisture.

Other Factors

Voles, weather, etc. But not coffee/tea.