edema on Air Plant
Quick answer
If your Air Plant has edema, the most likely cause is: Dense foliage or poor air circulation creates a "boundary layer" (~0.5mm) of humidity at the leaf surface, preventing proper transpiration. Water backs up in tissue, causing cells to swell and eventually burst, forming necrotic lesions often misdiagnosed as fungal spots.
Start here:
- 1. Install oscillating fans to disrupt the boundary layer
- 2. Maintain a Vapor Pressure Deficit (VPD) between 0.8-1.2 kPa
Why Air Plant gets edema
Tillandsia spp.
Dense foliage or poor air circulation creates a "boundary layer" (~0.5mm) of humidity at the leaf surface, preventing proper transpiration. Water backs up in tissue, causing cells to swell and eventually burst, forming necrotic lesions often misdiagnosed as fungal spots.
How to reverse edema on Air Plant
- 1
Install oscillating fans to disrupt the boundary layer
- 2
Maintain a Vapor Pressure Deficit (VPD) between 0.8-1.2 kPa
- 3
Space plants to allow airflow between leaves
Keep edema off this Air Plant
Avoid placing air plants in enclosed terrariums or tight groupings without active ventilation.