A snake plant turning yellow is nearly always a watering problem, and overwatering is the usual culprit. Sansevieria store water in their thick leaves and roots, so soggy compost quickly leads to root rot, which shows up as soft, yellowing leaves at the base. Less often, yellow leaves point to underwatering, too much direct sun, or simply an old leaf reaching the end of its life.
Here is how to work out which one you are dealing with and what to do about it.
Overwatering and root rot, the most common cause
If the yellowing leaves are also soft, mushy or wrinkled near the soil line, suspect overwatering. Snake plants need far less water than most houseplants: let the compost dry out almost completely, then water thoroughly and let it drain. In winter that can mean watering once a month or less.
Slide the plant out of its pot and check the roots. Healthy roots are firm and pale orange; rotten ones are brown, soft and smelly. If you find rot, cut away the affected roots and leaves with clean scissors, let the plant air-dry for a few hours, and repot into fresh, gritty compost.
The wrong soil and pot make it worse
Snake plants rot in dense, water-retentive compost. They want a free-draining, gritty mix, the kind you would use for cacti and succulents. Our Simply Cacti potting mix is formulated for exactly this, and a pot with drainage holes is non-negotiable. If water sits at the bottom of the pot with nowhere to go, yellow leaves follow. See our advice on watering cacti and succulents, which applies directly to snake plants.
Underwatering, the less common cause
Snake plants tolerate drought well, but months without water eventually take a toll. If the leaves are yellowing, wrinkling and going crispy at the tips rather than soft at the base, the plant may be too dry. Give it a thorough soak, let it drain, and return to a regular but sparing schedule.
Light and old age
Snake plants cope with low light, but harsh, direct summer sun through glass can bleach and yellow the leaves. Move a scorched plant back from the window. And remember that a single old leaf yellowing from the tip down, while the rest of the plant looks healthy, is often just natural ageing. You can cut the tired leaf off at the base.
Cold damage
Snake plants are tropical and hate the cold. A leaf pressed against an icy winter window, or a plant left below about 10 degrees, can yellow and soften from cold damage rather than water. Move it somewhere warmer and away from the glass.
Overfertilisation
These are light feeders, and too much fertiliser can scorch the roots and yellow the leaf tips. Feed only in spring and summer, at half the strength you would use for a leafy houseplant, and flush the pot with plain water if you suspect a build-up.
Seasonal watering matters
Most yellowing happens in winter, because people keep watering on their summer schedule while the plant has all but stopped growing. In the darker months, a snake plant may need water only once every four to six weeks. Cut back hard from autumn, and only resume regular watering when growth picks up in spring. Getting the seasonal rhythm right prevents most yellowing before it starts.
What to do next
Work through it in order: check whether the yellow leaves are soft (overwatered) or crispy (underwatered), inspect the roots, correct the soil and pot if needed, and adjust your watering. In our experience, most yellowing snake plants are being loved with too much water, not too little. If a leaf is beyond saving, remove it; the plant will keep growing from the base, and you can even propagate healthy leaves into new plants.