sunburn on Rubber Plant
Quick answer
If your Rubber Plant has sunburn, the most likely cause is: Direct sunlight exposure exceeding 5000 lux causes photooxidative damage to Ficus elastica leaves, breaking down chlorophyll and cell membranes in exposed tissue. The damage appears as uniform crispy brown patches on leaf surfaces facing the light source, distinct from fungal infections which show irregular margins with yellow halos. Rubber plants evolved as understory species and lack photoprotective mechanisms for intense direct light.
Start here:
- 1. Relocate immediately to bright indirect light location (east-facing window ideal)
- 2. Identify sunburn by uniform brown patches on light-facing leaf surfaces only
Why Rubber Plant gets sunburn
Ficus elastica
Direct sunlight exposure exceeding 5000 lux causes photooxidative damage to Ficus elastica leaves, breaking down chlorophyll and cell membranes in exposed tissue. The damage appears as uniform crispy brown patches on leaf surfaces facing the light source, distinct from fungal infections which show irregular margins with yellow halos. Rubber plants evolved as understory species and lack photoprotective mechanisms for intense direct light.
How to reverse sunburn on Rubber Plant
- 1
Relocate immediately to bright indirect light location (east-facing window ideal)
- 2
Identify sunburn by uniform brown patches on light-facing leaf surfaces only
- 3
Distinguish from fungal spots: sunburn has no yellow halo or spreading margins
- 4
Remove severely damaged leaves at base with sterilized shears to redirect energy
- 5
Expect 4-6 week recovery period; new growth resumes from stem tips only
Keep sunburn off this Rubber Plant
Position plants 3-6 feet from south/west windows or use sheer curtains to filter light. Maintain 2000-4000 lux maximum. Acclimate gradually over 7-14 days when relocating to brighter spaces.