Sunburn on orchid
What's Happening
Orchid sunburn occurs when leaves are exposed to direct sunlight, particularly intense afternoon sun, causing photo-oxidative damage to leaf cells. The damage is exacerbated when water droplets on leaves act as magnifying lenses, focusing sunlight onto specific spots and creating localized burns. Unlike terrestrial plants, orchids evolved as epiphytes in forest canopies where they receive filtered, dappled light. Their thin, photosynthetic leaves lack the protective structures needed for direct sun exposure.
How to Fix It
- 1
Immediately relocate orchid to bright indirect light only - east-facing windows with sheer curtains are ideal
- 2
Avoid misting or overhead watering during peak light hours (10am-4pm) to prevent water droplet lens effects
- 3
Trim severely damaged leaf portions with sterile scissors to improve aesthetics and prevent secondary infection
- 4
Gradually acclimate orchids to any light changes over 7-10 days to prevent shock
- 5
Monitor with light meter: target 1500-2500 foot-candles for Phalaenopsis, 2000-4000 for Cattleya
What You'll Need
How to Prevent It
Position orchids 3-5 feet from south/west windows or use UV-filtering window film; maintain consistent bright indirect light without direct sun exposure; water early morning so leaves dry before peak light hours; use light meters to verify intensity stays within species-specific ranges.