Plant care guide
Snake Plant Root Rot: Check the Roots, Cut, Repot
Updated · First published
Why does my Snake plant have root rot?
Snake plant root rot is caused by mix that stays wet: the roots turn brown or black and soft, and the plant leans, wobbles or yellows even though it has been watered. If firm roots remain, cut out the rot and repot in fresh, free-draining cactus compost in a snug pot.
What to do first
Stop watering and unpot the plant. Sort firm roots from soft, dark ones, cut out the rot with clean shears, and repot healthy sections in fresh cactus compost in a pot only slightly larger than the roots. Water again only when the compost has dried out.
Snake plants are hard to kill, but wet compost does it. Penn State Extension’s snake plant article calls root rot from overwatering a common affliction. NC State Extension’s snake plant profile warns the same: overwater and the roots will rot.
This page covers the roots. If the plant is soft at the base, or the thick rhizomes are mushy, read our article on snake plant rhizome rot as well.
Signs that send you to the roots
- The whole plant leans or wobbles. The RHS sansevieria growing guide says a well-rooted plant sits firmly in its pot. If the whole plant leans over, it says to check for root rot.
- Wilting or collapse in moist compost. University of Maryland Extension’s root rot page notes that rotting roots can cause wilting even when the mix holds enough water.
- Yellowing, browning and poor growth. Maryland lists these too.
- Compost that stays wet for days, and a bad smell. UW–Madison Extension’s root rot article mentions odor from rotted roots.
Read the roots
Tip the plant out. Support the leaves and slide out the root ball rather than pulling on a leaf.
| What you find | What it means |
|---|---|
| Firm, light-colored roots | Healthy |
| Brown to black roots that are soft or mushy | Rot |
| Outer root skin slides off, leaving a thin thread | Rot |
| Most of the root mass stays in the pot | Advanced rot |
| Grubs among the roots | Vine weevil, not rot |
Maryland Extension’s diagnosis table describes healthy roots as light-colored and firm. Its root rot page describes the sliding root skin and roots left behind in the pot. The RHS notes that vine weevil grubs feed on snake plant roots and can make leaves collapse. That needs a different response.
What to do
- Cut out the rot. Clemson Extension’s disorders factsheet advises cutting out infected roots when only a few are affected, then repotting in sterile soil. Use clean, sharp shears.
- Discard the old compost. UW–Madison says not to reuse potting mix from a plant with root rot.
- Split off healthy sections if needed. The RHS describes dividing a clump into pieces, each with leaves and roots, and discarding damaged or dead sections.
- Repot in free-draining compost. The RHS recommends peat-free cactus compost, or two parts loam-based compost to one part grit.
- Choose a snug pot. The RHS says to use a pot only slightly larger than before, with plenty of drainage holes. A much larger pot holds spare compost that stays damp. UW–Madison adds: no gravel layer at the bottom, as it can hinder drainage.
- Clean up. UW–Madison suggests disinfecting tools and surfaces with a 10% bleach or detergent solution, or alcohol.
- Skip fungicides. UW–Madison does not recommend them for houseplant root rot. Clemson notes they usually cost more than a new plant.
If almost no healthy roots remain, Clemson says a plant with mostly dark, soft roots is better discarded. Before you do, firm leaves can be used as cuttings; see our snake plant propagation guide.
Aftercare
- Water only when the compost has dried out. The RHS suggests checking with a finger, not watering on a schedule.
- Water sparingly in winter. NC State suggests watering only every one to two months in winter.
- Never leave it standing in water. Virginia Cooperative Extension’s watering guide warns that more than 60 minutes in a drainage tray can lead to root rot.
- Support a wobbly plant. The RHS suggests a cane and string until new divisions are well rooted.
- Use a heavy pot for tall plants. Penn State notes tall snake plants can topple, especially when the soil is dry.
Expect damaged leaves to stay marked. Judge recovery by a firm, upright plant and new leaves.
If you caught it early and only see yellow leaves, our yellow leaves guide helps rule out other causes. Leaning without rot is covered in our drooping guide.
References
- RHS: How to grow sansevierias
- NC State Extension Gardener Plant Toolbox: Dracaena trifasciata
- Penn State Extension: Snake Plant, A Forgiving, Low-maintenance Houseplant
- University of Maryland Extension: Root Rots of Indoor Plants
- Clemson Cooperative Extension, HGIC 2251: Houseplant Diseases & Disorders
- UW–Madison Extension: Root Rots of Houseplants
- Virginia Cooperative Extension: Properly Watering Container Houseplants (SPES-804)
- University of Maryland Extension: Diagnose Indoor Plant Problems
How this guide was put together: RHS, NC State Extension, Penn State Extension, University of Maryland Extension, Clemson Extension, UW–Madison Extension and Virginia Cooperative Extension guidance.