Rhododendron Leaf Loss in Winter: Deer vs. Weather Damage

Rhododendron leaf loss in SW Ohio during a harsh winter with deer present is more likely weather-related than browse—rhododendron leaves are unpalatable (toxic) to deer.

Diagnosis

Winter desiccation: Frozen soil prevents water uptake; winds strip moisture from evergreen leaves. Leaves curl, brown, drop.

Deer browse unlikely: Deer avoid rhododendrons unless starving. Check for ragged tear marks (browse) vs. clean abscission (weather).

Spring Action

Wait for bud break. Prune dead wood back to live buds. Light fertilization after new growth emerges. Most rhododendrons recover fully from winter foliar loss.

Monitor for actual browse signs next winter; apply repellents only if confirmed.