Edema / Bumps on Leaves
Edema appears as raised bumps, blisters, or corky growths on leaves. It occurs when the plant absorbs water faster than it can transpire.
Cause possibili
Overwatering with Low Transpiration
Why: When the plant takes up more water than it can release through its leaves, cells swell and burst.
Signs to check: Raised, blister-like bumps on leaf undersides, bumps may turn brown and corky over time.
High Humidity with Cool Temperatures
Why: Cool, humid conditions reduce transpiration while roots continue absorbing water.
Signs to check: Bumps appear during cool, overcast periods, primarily on newer leaves.
Inconsistent Environmental Conditions
Why: Fluctuating conditions between warm/dry and cool/humid can trigger edema.
Signs to check: Damage appears sporadically, corresponds with weather or seasonal changes.
Cosa controllare
- 1Check if bumps are on the undersides of leaves (characteristic of edema)
- 2Review watering frequency relative to light and temperature
- 3Assess humidity levels and air circulation
- 4Rule out pests — edema bumps are part of the leaf tissue, not removable
Cosa puoi fare
- Reduce watering frequency and allow soil to dry more between waterings
- Improve air circulation around the plant
- Increase light exposure to boost transpiration
- Avoid misting the plant excessively
Quando cercare aiuto
- Bumps are accompanied by yellowing and leaf drop
- Bumps are easily removed or contain insects (likely a pest, not edema)
Punto chiave
Edema is a physiological condition, not a disease. It resolves when the balance between water uptake and transpiration is corrected.
Monitora il recupero nell'app
Registra i progressi, imposta promemoria e ottieni diagnosi basate sull'IA.
Fonti: NC State Extension, University of Florida IFAS Extension. Contenuto compilato da riferimenti orticoli pubblicamente disponibili a scopo educativo. Le organizzazioni fonte sono elencate solo per trasparenza e non implicano approvazione.