Crispy Leaves on begonia rex
What's Happening
Begonia rex cultivars (including 'Frosty', 'Escargot') develop crispy leaf margins and edges due to foliar mineral salt accumulation from tap water irrigation and humidifiers. The delicate, textured leaves of rex begonias wick and retain minerals, causing localized tissue necrosis that appears as asymmetric browning and crisping along leaf edges. This condition is distinct from humidity deficits and represents a water quality issue rather than moisture stress.
How to Fix It
- 1
Switch to Brita-filtered, distilled, or rainwater for all plant watering and humidifier filling immediately
- 2
Trim affected crispy leaf edges with sterile scissors to improve aesthetics and prevent secondary infection
- 3
Install a small fan near plants to increase airflow and speed drying of any water that contacts foliage
- 4
Group multiple humidity-loving plants together to create a microclimate without mechanical humidification
- 5
Repot annually using fresh soil mix to prevent mineral salt accumulation in growing medium
How to Prevent It
Use filtered, distilled, or rainwater exclusively for both irrigation and humidification; avoid misting which concentrates minerals on leaf surfaces; maintain 60-70% humidity via pebble trays rather than evaporative humidifiers; flush soil monthly with distilled water to prevent mineral buildup.