Root Rot Media Prevention on orchid
What's Happening
Root rot in Phalaenopsis develops when roots remain in anaerobic (oxygen-depleted) conditions for 72+ hours. Moss causes rot through structural breakdown and compaction over time, not inherent properties—fresh moss provides excellent aeration. Bark causes rot through inappropriate grade selection (too fine) or pot size mismatch. The critical error is choosing media based on convenience rather than root health requirements—both media work when matched to care patterns.
How to Fix It
- 1
Test media aeration: Pack dry media into clear cup, add water—water should flow through within 10 seconds; if it pools, media is too fine or compacted
- 2
Match media to pot type: Moss works best in open baskets or net pots; bark works in any container with drainage holes
- 3
Seasonal adjustment: Many orchid parents switch to bark in summer (faster drying) and moss in winter (slower drying) to match environmental conditions
- 4
Repotting trigger: When moss turns dark brown/black or bark shows green algae/fungal growth on surface, anaerobic conditions exist—repot immediately
How to Prevent It
Clear orchid pots (slotted sides) eliminate media-choice guesswork by allowing visual root monitoring—roots should appear silvery-green when dry, bright green when hydrated, never brown or mushy regardless of media choice.