Houseplant Root Rot: Early Signs, Causes and Treatment
Quick answer: Root rot is a general term for root decay, often associated with potting mix that stays wet and oxygen-poor. Early clues include persistent wet soil, yellowing, wilt despite moisture, slow growth, a sour smell, and roots that become soft instead of firm.
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Helpful tools for root-rot prevention and recovery
- XLUX T10 Soil Moisture Meter (paid link)
- Espoma Organic Perlite (paid link)
- Fiskars Solid Snip Micro-Tip SP13 (paid link)
Early signs of root rot
- Soil stays wet unusually long
- Lower leaves yellow quickly
- Plant wilts even though the pot is damp
- Growth stops
- Fungus gnats become persistent
How to inspect the roots
Remove the plant carefully and examine texture. Healthy roots vary in color but generally feel firm. Rotting roots often feel soft, slimy, hollow, or easily peel apart.
What causes root rot?
Frequent watering is only one cause. Dense soil, blocked drainage, oversized pots, low light, cool temperatures, and standing water can all keep roots wet too long.
How to treat root rot
- Remove clearly decayed roots using clean tools.
- Discard waterlogged old mix.
- Use a clean container with drainage.
- Repot in a mix appropriate for the species.
- Adjust watering to the new root mass and environment.
Can every plant be saved?
Not always. If most roots and the stem base are decayed, propagating healthy stems, nodes, leaves, or divisions may be the best option depending on the plant.
FAQ
Can a plant have root rot without yellow leaves?
Yes. Root damage can begin before obvious leaf symptoms appear.
Should I fertilize after root rot?
Usually wait until healthy roots and new growth show recovery.
Prevention starts with our houseplant watering guide and soil guide.