fungal infection on Peperomia
Quick answer
If your Peperomia has fungal infection, the most likely cause is: Peperomia fungal infection (Botrytis cinerea or Myrothecium) occurs when wet leaf surfaces combine with stagnant air and temperatures between 65-75°F, creating ideal conditions for spore germination. Peperomia's semi-succulent leaves with thin cuticles are highly susceptible — conidia germinate within 24 hours on perpetually wet foliage, with fungal mycelium spreading through intercellular spaces and producing necrotic lesions that appear as water-soaked spots progressing to tan/brown dead tissue.
Start here:
- 1. Isolate infected plant immediately to prevent spore spread
- 2. Remove all infected leaves with sterile scissors, cutting 1/4 inch into healthy tissue
Why Peperomia gets fungal infection
Peperomia spp.
Peperomia fungal infection (Botrytis cinerea or Myrothecium) occurs when wet leaf surfaces combine with stagnant air and temperatures between 65-75°F, creating ideal conditions for spore germination. Peperomia's semi-succulent leaves with thin cuticles are highly susceptible — conidia germinate within 24 hours on perpetually wet foliage, with fungal mycelium spreading through intercellular spaces and producing necrotic lesions that appear as water-soaked spots progressing to tan/brown dead tissue.
How to reverse fungal infection on Peperomia
- 1
Isolate infected plant immediately to prevent spore spread
- 2
Remove all infected leaves with sterile scissors, cutting 1/4 inch into healthy tissue
- 3
Improve air circulation: space plants, run fan on low, or crack window for passive airflow
- 4
Reduce humidity to 40-50% if above 60% — fungal growth slows below 60% RH
- 5
Apply copper-based fungicide or neem oil spray to remaining foliage, covering both leaf surfaces
- 6
Water at soil level only — never wet foliage; allow soil surface to dry before watering
- 7
Repeat fungicide application every 7 days for 3 total treatments
Keep fungal infection off this Peperomia
Avoid overhead watering; water at soil level only; maintain 40-60% humidity (not higher); ensure air circulation with fans or by spacing plants; remove dead leaves promptly; quarantine new plants for 2 weeks.