Oakleaf Hydrangea Wilt: Root Rot vs. Vole Damage

Armillaria root rot common in oakleaf hydrangea plantings. Initial symptom: wilting of one or more previously healthy shoots. Irrigation doesn't help; within weeks rest of branches wilt, plant dies.

Poor drainage usually culprit. If less than half affected, remove dead limbs, dig up, add plenty soil conditioner to planting area, replant. With luck may send new sprouts and bloom another day.

My colleague Theresa Schrum observed sudden wilting on her oakleaf hydrangea. Investigating base revealed root rot wasn't culprit. Voles had gnawed off bottom of hydrangea stems. No wonder it suddenly looked poorly!