Light Needs on aloe vera
What's Happening
Insufficient light causes etiolation (leggy, stretched, pale growth) in Aloe vera, a full-sun succulent requiring 2000-5000 foot-candles. Low light (<500 PPFD) triggers phototropism and slows metabolism, mimicking dormancy. Sudden direct sun exposure on low-light-adapted plants causes photooxidative damage (sunburn) due to lack of photoprotective pigments—appearing as bleached or scorched patches.
How to Fix It
- 1
Assess etiolation: Check for pale, stretched leaves and weak stems confirming low light
- 2
Acclimate gradually: Start with 1-2 hours direct sun daily, increase by 30min weekly over 2-4 weeks
- 3
Use grow lights: Position LED 6-12 inches above plant for 12-16 hours daily if window insufficient
- 4
Behead if leggy: Cut top 4-6 inches, allow 1-2 days to callous, root in well-draining soil
- 5
Monitor new growth: Compact, upright growth from center indicates successful recovery
How to Prevent It
Position in south-facing window for 4-6 hours bright indirect light with 2-4 hours direct sun. Use full-spectrum LED grow lights (5000-6500K, 20-40W) 12-16 hours daily when natural light insufficient. Maintain 1000-2000 foot-candles for compact growth.