sunburn on Anthurium
Quick answer
If your Anthurium has sunburn, the most likely cause is: Anthurium sunburn manifests as pale, bleached patches or brown papery burns on leaf tissue when light intensity exceeds the plant's threshold. Anthuriums are understory aroids adapted to bright filtered light (2000-4000 lux) and cannot tolerate unfiltered direct sun, which causes photoinhibition of chlorophyll and rapid cell death in exposed areas. South and west-facing windows without sheer curtains are the most common culprits, especially in summer when UV index peaks.
Start here:
- 1. Move plant immediately to location with bright indirect light — filtered by sheer curtains or placed behind other plants
- 2. Expect existing sunburn damage to remain permanently (cell death is irreversible) but new growth will be unaffected if light is corrected
Why Anthurium gets sunburn
Anthurium spp.
Anthurium sunburn manifests as pale, bleached patches or brown papery burns on leaf tissue when light intensity exceeds the plant's threshold. Anthuriums are understory aroids adapted to bright filtered light (2000-4000 lux) and cannot tolerate unfiltered direct sun, which causes photoinhibition of chlorophyll and rapid cell death in exposed areas. South and west-facing windows without sheer curtains are the most common culprits, especially in summer when UV index peaks.
How to reverse sunburn on Anthurium
- 1
Move plant immediately to location with bright indirect light — filtered by sheer curtains or placed behind other plants
- 2
Expect existing sunburn damage to remain permanently (cell death is irreversible) but new growth will be unaffected if light is corrected
- 3
If no sheer curtain available, apply frosted glass film to windows to reduce UV transmission by 50-70%
- 4
Use 6500K full-spectrum grow lights on 12-hour timers if natural light is insufficient or too intense — position 18-24 inches above plant
- 5
Monitor new growth for 6-8 weeks; if new leaves show continued burn despite light change, investigate reflective surfaces (white walls, mirrors) amplifying light
Keep sunburn off this Anthurium
Position Anthuriums 4-6 feet from east or north-facing windows; use sheer curtains to filter intense west/south light; move 2-3 feet further from windows in summer when solar intensity increases by 30-40%.