Root Rot on rubber plant
What's Happening
Root rot in Ficus elastica develops when the fibrous root system remains in waterlogged, poorly aerated soil for extended periods. Anaerobic conditions (oxygen <2mg/L) promote bacterial and oomycete pathogens (Pythium, Phytophthora) that colonize root tissue, causing cellular breakdown. Unlike succulents with water-storing tissues, rubber plant roots are thin and fibrous, making them particularly vulnerable to oxygen deprivation. Early detection is difficult as thick leaves mask root decline until structural failure occurs.
How to Fix It
- 1
Unpot plant and rinse all soil from roots to assess damage extent
- 2
Trim ALL black, mushy, or foul-smelling roots with sterilized scissors—healthy tissue is white/firm
- 3
Treat remaining roots with 3% hydrogen peroxide solution (1:1 with water) for 20 minutes
- 4
Allow plant to callus on dry paper towel for 48 hours before repotting
- 5
Repot in completely dry, well-draining mix; withhold water for 7-10 days
How to Prevent It
Water only when top 2-3 inches of soil are bone-dry. Use terracotta pots for natural moisture wicking. Ensure pot has multiple drainage holes. Never allow plant to sit in standing water.