How do I prevent root rot?
Written by
Olivia Mitchell
Reviewed by
Prof. Martin Thorne, Ph.D.The prevention of root rot begins even before a plant is introduced into its new container. My own fiddle leaf fig was saved when I selected a terracotta pot versus ceramic, as the porous walls assisted in preventing excess water from accumulating at the bottom of my pot. To effectively prevent root rot, I consider three aspects: the type of container, the science of the soil, and the frequency of watering each plant requires.
Drainage Optimization
- Use unglazed clay pots with 3+ drainage holes
- Layer 1-2" of pumice beneath soil in deep containers
- Avoid decorative pot covers that trap standing water
Watering Discipline
- Insert finger 2.5" into soil, water only if dry
- Use moisture meters calibrated for specific plant types
- Adjust for humidity: reduce watering by 40% at >60% RH
Tool Sterilization
- Soak pruners in 70% alcohol for 5 minutes between plants
- Flame-sterilize repotting tools until red-hot
- Disinfect cache pots annually with 10% bleach solution
Soil Aeration
- Mix 30% orchid bark into standard potting soil
- Add perlite to heavy soils at 1:1 ratio
- Test drainage: 1 gallon water should exit pot in 90 seconds
Make seasonal adjustments, in dormancy, my monstera needs 50% less water compared to summer. I monitor environmental changes using smart sensors. As a trigger, the $25 hygrometer alerting me when I hit 40-50% moisture in the soil for 12 tropical plants* kept the plants alive for more than a year.
Read the full article: Root Rot Symptoms: Signs, Causes, and Solutions
