Snake plant leaves turning yellow?

On a snake plant, yellow leaves usually mean the roots are stressed by wet soil or poor light, while one old lower leaf yellowing slowly can be normal.

Answer what you can see

The ranking updates as you go. Nothing is sent anywhere.

Push a finger two inches into the soil. What does it feel like?

Which leaves are affected?

Where does it live?

How fast did this happen?

Overwatering and low light often overlap because low light keeps the pot damp, and drought and pests can both fit dry soil with yellowing; use the tie-breakers in the confirm lines, especially soil staying wet, root condition, and visible pests.

The causes in full

Overwatering or poor drainageMOST COMMON

How to tell
The soil feels soggy or stays damp for many days, the pot may have no drainage hole or water in the saucer, and yellow leaves may feel soft at the base.

What to do
If the mix is not dry all the way through to the bottom, stop watering and empty any saucer or cover pot. If the leaf bases are soft or the soil smells sour, unpot the plant, cut off black or mushy roots, and repot in a fast-draining mix in a pot with drainage.

Too little light with soil staying wetCOMMON

How to tell
The plant lives in a dim spot or several feet from a window, grows very slowly, and the potting mix remains damp long after watering.

What to do
Move it to bright but indirect light, or nearer a window without harsh hot sun. If the mix is not dry all the way through to the bottom, do not water yet.

Prolonged drought or a root-bound dry potCOMMON

How to tell
The soil is dry, shrunken from the pot edge, or water runs straight through without soaking in, and the leaves may look wrinkled, thin, or folded.

What to do
If the mix is dry all the way through to the bottom, water slowly until the whole root ball is moistened and excess drains out. If water races down the sides, soak the pot in a basin for 20 to 30 minutes, then let it drain fully.

Cold draught or direct-sun scorch at the windowLESS COMMON

How to tell
Yellowing is mostly on the side facing the window, especially after a cold night, a hot sunny spell, or leaves touching cold glass.

What to do
Move the plant back from cold glass, heaters, and strong direct sun through glass, and keep it in bright indirect light. Do not water because of this damage unless the mix is dry all the way through to the bottom.

Mealybugs or spider mitesLESS COMMON

How to tell
Look closely in the leaf joints and along both sides of the leaves for white cottony specks, sticky spots, fine webbing, or tiny moving dots.

What to do
Isolate the plant, wipe pests off with a damp cloth, and use a labeled insecticidal soap or horticultural oil if they keep coming back. Keep watering only when the mix is dry all the way through to the bottom, because pest damage and water stress can look similar.

Normal old lower leaf ageingRARE

How to tell
It is likely normal only if one oldest, lowest leaf is yellowing slowly while the rest of the plant is firm, upright, and not spreading yellow.

What to do
Trim off the fully yellow leaf if it bothers you. Do not water to fix a single ageing leaf unless the mix is dry all the way through to the bottom.

Will it recover?

Yellow snake plant leaves usually do not turn green again, so the goal is to stop the cause and grow firm new leaves.

Stopping it happening again

Use a pot with drainage, give bright indirect light, keep it away from cold draughts and hot glass, and water only when the potting mix is dry all the way through to the bottom.