Root rot
The most common cause of houseplant death.
Updated on 2026-07-17
Overview
Root rot follows prolonged waterlogging. Roots, starved of oxygen, become vulnerable to pathogens like Pythium and Phytophthora, which cause decay.
Differential diagnosis
Healthy roots: white/cream, firm. Rotten roots: dark, soft, foul-smelling. If the stem base feels mushy: advanced rot.
Natural remedies
Pull the root ball, cut all rotten roots, dust the rest with cinnamon powder (natural antifungal), repot in dry mix.
Treatments
In severe cases, systemic fungicide with fosetyl-aluminum. Withhold water for 7–10 days.
Prevention
Pots with drainage, well-draining mix, never standing water in the saucer.