root rot yellowing on Anthurium
Quick answer
If your Anthurium has root rot yellowing, the most likely cause is: Anthurium yellowing from root rot occurs when waterlogged soil creates anaerobic conditions favoring Pythium and Fusarium pathogens, which destroy fine feeder roots and impair the plant's ability to transport nitrogen and magnesium upward — resulting in uniform leaf chlorosis beginning with older leaves as the plant sacrifices old tissue to preserve new growth.
Start here:
- 1. Unpot and inspect roots: healthy roots are white and firm; rotted roots are black, mushy, and emit foul odor
- 2. Trim all black/mushy roots with sterilized scissors, cutting 1/4 inch into healthy tissue
Why Anthurium gets root rot yellowing
Anthurium spp.
Anthurium yellowing from root rot occurs when waterlogged soil creates anaerobic conditions favoring Pythium and Fusarium pathogens, which destroy fine feeder roots and impair the plant's ability to transport nitrogen and magnesium upward — resulting in uniform leaf chlorosis beginning with older leaves as the plant sacrifices old tissue to preserve new growth.
How to reverse root rot yellowing on Anthurium
- 1
Unpot and inspect roots: healthy roots are white and firm; rotted roots are black, mushy, and emit foul odor
- 2
Trim all black/mushy roots with sterilized scissors, cutting 1/4 inch into healthy tissue
- 3
Rinse remaining roots in 3% hydrogen peroxide solution (1:4 water) for 30 seconds to sterilize
- 4
Repot in fresh chunky aroid mix (50% orchid bark, 30% perlite, 20% peat) in pot with clear drainage
- 5
Water sparingly post-repot: wait 5-7 days, then keep soil lightly moist only
- 6
Place in bright indirect light (2000-4000 lux), 70-85°F, 60-80% humidity for recovery
Keep root rot yellowing off this Anthurium
Water only when top 2-3 inches of chunky aroid mix reach field capacity; use pot with unobstructed drainage; never let pot sit in standing water; maintain 60-80% humidity to reduce evaporative stress.