Sunburn on echeveria
What's Happening
Succulents grown in low-light indoor conditions develop thin, etiolated leaves with reduced cuticular wax and insufficient photoprotective pigments (anthocyanins, carotenoids). When abruptly exposed to direct sunlight or intense grow lights, the leaf epidermal cells undergo photoxidative damage—cellular rupture from reactive oxygen species (H2O2) buildup due to rapid photosystem imbalance. The tissue cannot dissipate excess energy, causing chlorophyll degradation and cell death that appears as bleached, brown, or crispy patches typically on the most exposed leaf surfaces.
How to Fix It
- 1
Immediately move affected plant to bright indirect light only—stop all direct sun exposure
- 2
Do not remove burnt leaves unless completely dried and crispy; damaged tissue still photosynthesizes
- 3
Maintain normal watering schedule (do not overwater to 'compensate' for damage)
- 4
Allow 4-8 weeks for new growth to emerge from center; new leaves will form with proper pigments
- 5
Resume gradual acclimation only after full recovery and new growth appears
What You'll Need
How to Prevent It
Acclimate all light transitions gradually over 7-14 days: begin with 1-2 hours of morning sun or filtered light, increasing exposure by 30-60 minutes daily. Use sheer curtains or 50-70% shade cloth initially. Maintain plants in bright indirect light (not deep shade) before any transition to build baseline resilience.