Gloxinia Bud Rot: Watering, Light, and Botrytis

Gloxinia buds, young flowers, and peduncles turning brown, soft, watery in 30°C humid room. Owner asks about cooler relocation.

Differential Diagnosis

• Watering: Moist soil needed, but overwatering → root rot (check roots: white=healthy, brown=rot, no cure).
• Light: Bright indirect required. Current location may be insufficient.
• Botrytis blight: Fungal, favors humidity. Test: bag brown tissue with damp paper towel 24-48 hrs; fuzzy brown growth = Botrytis.

Management

• Reduce humidity if Botrytis confirmed.
• Fungicides if cultural fails.
• Cooler room OK if light adequate.
• Gloxinias notoriously difficult as houseplants.

Systematic elimination of variables needed—no single certain answer.