Spider plant leaves turning yellow?

On spider plants, one old lower leaf yellowing now and then can be normal, but widespread yellowing usually means the roots are too wet, too dry, stressed by the window, or being attacked by pests.

Answer what you can see

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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?

Several causes share possible answer sets: overwatering and low light can both show as damp soil with older or even yellowing over weeks to months, underwatering and window heat can both show as dry soil after direct sun, and pests or fertilizer damage can mimic general water-stress yellowing, so use the confirm checks before acting.

The causes in full

Overwatering or poor drainageMOST COMMON

How to tell
The pot feels heavy, the top 2 inches stay damp or wet for days, the saucer holds water, or the soil smells sour, and yellowing starts on the oldest lower leaves or spreads evenly.

What to do
Because the top 2 inches are soggy, wet, or still damp, do not water again until the top 2 inches feel dry and crumbly. Empty the saucer, make sure the pot has open drainage holes, and repot into fresh potting mix if the soil smells sour or roots are brown and mushy.

Underwatering or a dried-out root ballCOMMON

How to tell
The pot feels very light, the top 2 inches are dry or the soil has pulled away from the pot edge, and leaves may look limp, dull, or yellow from the lower parts outward.

What to do
Because the top 2 inches are dry and crumbly or bone dry, water thoroughly now until water runs from the drainage holes; if the root ball is pulling from the pot, soak the pot in a basin for about 20 minutes, then drain it well. After that, water only when the top 2 inches feel dry and crumbly.

Too little lightCOMMON

How to tell
The plant sits in a dim corner or too far from the window, growth is weak or pale, and the soil stays damp longer than it used to.

What to do
Move it to bright but indirect light, close to a window but out of harsh direct sun. If the top 2 inches are damp or wet, wait to water until the top 2 inches feel dry and crumbly.

Window stress: direct sun, heat, or cold draughtLESS COMMON

How to tell
Yellowing or pale damage is strongest on the side facing the window, especially after hot sun through glass, a cold night, or a draught from a nearby window or vent.

What to do
Move the plant back into bright indirect light and away from hot glass, cold glass, heaters, and draughts. If the top 2 inches are dry and crumbly or bone dry after sun or heat, water thoroughly and drain; if they are damp, do not water yet.

Spider mites or mealybugsLESS COMMON

How to tell
Look closely under leaves and in the crown for fine webbing, tiny moving specks, white cottony clumps, sticky residue, or yellow speckling that spreads despite correct watering.

What to do
Isolate the plant, rinse or wipe the leaves, and treat all leaf surfaces and the crown with insecticidal soap or horticultural oil according to the label; repeat as directed. Do not use dish soap as a substitute.

Fertilizer or mineral salt damageRARE

How to tell
Suspect this if yellowing followed a recent feeding, the leaf tips or edges are also browning, or you see a white crust on the soil surface or pot rim.

What to do
Stop fertilizing for now and remove any crusty top layer of soil. If the top 2 inches feel dry and crumbly, flush the pot slowly with plain water until it drains well; if the top 2 inches are damp, wait until they feel dry and crumbly before flushing.

Will it recover?

Leaves that are already fully yellow will not turn green again; the goal is to stop the cause and get healthy new growth.

Stopping it happening again

Keep the plant in bright indirect light in a pot with open drainage, empty the saucer, protect it from hot or cold window draughts, inspect for pests monthly, and water only when the top 2 inches feel dry and crumbly.