Why are my peace lily’s leaves turning yellow?
Peace lily leaves most likely turn yellow from too much water or poor drainage. Dry soil, cold drafts, strong sun, and low nutrients can also cause it. Check how wet the soil is, look at the roots, and note where the yellowing starts before you change anything.
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What most often turns peace lily leaves yellow?
Overwatering is a common cause. Clemson Cooperative Extension says root and stem diseases are the most common peace lily problem. It says they are usually linked to overwatering. The Royal Horticultural Society says overwatering can turn leaves brown or yellow.
Other causes are possible. The UC Statewide IPM Program lists not enough light, cold, overwatering, poor drainage, and soil pests or disease as causes of yellow, dropping leaves on houseplants.
University of Maryland Extension says yellow leaves are often one of the first signs of plant stress. If the stress isn’t fixed, yellow leaves may turn brown. The same source says problems blamed on insects or disease often come from the plant’s environment.
How do you check the soil and roots?
Start with the soil, then look at the roots. University of Illinois Extension says to remove the plant from its pot with care and look at the roots. This helps sort out watering problems.
- Dark brown to black roots point to overwatering, says University of Illinois Extension.
- Rusty orange to light brown roots point to underwatering, says the same source.
If overwatering is the cause, University of Illinois Extension says to hold off watering until the soil is quite dry. Then start a new watering schedule slowly. After two weeks, it says to add a houseplant fertilizer. If you see no improvement in the next two weeks, it says to repot in fresh soil.
Clemson says never let a peace lily sit in a saucer of excess water. That leads to root rot. The Royal Horticultural Society says compost that stays too wet for long periods can cause root rot. Our guide to root rot symptoms shows what to look for. Our page on overwatering versus underwatering helps you tell the two apart.
For daily care, Clemson says to keep the soil moist but not soggy. Let it dry out slightly between waterings. University of Illinois Extension says fertilizer or household pesticides are not an appropriate first response to a yellow leaf. If you do use a pesticide or fertilizer product, follow the product label and choose one labeled for houseplants.
Which sign points to which cause?
Peace lily yellowing can look different depending on the cause. Match what you see to a row, and treat it as a likely lead, not a certainty.
| What you notice | What to check | A useful next step |
|---|---|---|
| Yellow leaves and wet soil | Look for dark brown to black roots. University of Illinois Extension links them to overwatering. Check for water in the saucer. | Empty the saucer. Hold off watering until the soil is quite dry, then restart slowly. |
| Wilting, with yellow leaves and edges | Clemson says soil that dries out too much can cause this. Rusty orange to light brown roots point to underwatering. | Water promptly. The Royal Horticultural Society says drooping from lack of water should soon recover. |
| Yellow between the veins, veins still green | Clemson says low magnesium may turn the tissue between the veins yellow while the veins stay green. | Review your feeding. Clemson says peace lilies need very little fertilizer. If you feed, follow the product label and use one labeled for houseplants. |
| Yellow leaves with brown edges or tips | Think about dry air, too much fertilizer, and tap water. The Royal Horticultural Society says dry air can brown leaf edges. It says fluoride in tap water can harm leaves. Clemson says too much fertilizer can burn leaf tips and roots. | Use rainwater or filtered water when you can. Go lighter on fertilizer. |
| Yellowing after you moved the plant | University of Illinois Extension says moving a plant can cause yellowing or leaf drop. | Give the plant time to adjust. If yellowing lasts longer than a few weeks, try another spot and change the watering schedule slightly. |
What else can turn peace lily leaves yellow?
Light, heat, a tight pot, and pests can all play a part. Peace lily yellowing does not always come from watering.
- Light: Clemson says peace lilies grow best in bright, indirect light and can tolerate low light. It says to keep them out of direct sun, because the heat will scorch the leaves. Our page on how much light a houseplant needs can help you judge your spot.
- Temperature: Clemson says peace lilies prefer daytime temperatures of 68 to 85 °F. Nights can be about 10 °F cooler. It says cold damage may occur below 60 °F. It also says to keep them away from heat or air-conditioning vents.
- A crowded pot: Clemson says it is time to repot if roots grow through the drainage holes or circle on top of the soil. It suggests a pot one to two inches larger. A pot that is too large may keep the potting medium too wet.
- Pests: Clemson says peace lilies have few insect pests. Fungus gnats, mealybugs, spider mites, and scales can be a problem, so check the leaves often. The UC Statewide IPM Program says mealybugs typically cause stunted growth, yellowing, and wilting. See our page on mealybugs for what to look for.
Is it worth getting a second opinion?
A second opinion can help when the signs overlap. University of Maryland Extension says noting the pattern and progression of symptoms helps find the cause. Take clear photos as the yellowing changes. Our tips on how to photograph a sick plant can help.
Plant Doctor, an AI plant diagnosis app for iPhone, uses three photos of the plant to point to the most likely cause, with the evidence behind it.
If the yellowing is severe or keeps spreading, a local nursery or your extension service can look at the plant in person.
Peace lily questions
Can a peace lily recover from underwatering?
Often, yes. The Royal Horticultural Society says a peace lily droops from lack of water. If you water it promptly, it should soon recover with no ill effects.
Does moving a peace lily cause yellow leaves?
It can. University of Illinois Extension says moving a plant may cause yellowing or leaf drop. The plant will eventually adjust if conditions are favorable. If yellowing lasts longer than a few weeks, the same source says to try another spot and change the watering schedule slightly.
Should I add fertilizer when the leaves turn yellow?
Not as a first step. University of Illinois Extension says fertilizer or household pesticides are not an appropriate first response. It does say yellowing can happen when a plant needs fertilizer. A root-bound plant may simply need a larger pot. If you use a product, follow the product label and choose one labeled for houseplants.
Is it too late for a badly yellowed plant?
Sometimes it may be. The UC Statewide IPM Program says it is sometimes not practical to restore a plant’s health. Replacing the plant may be better. A local nursery or extension service can help you decide.
Sources and further reading
Care guidance checked against the sources below. Plant Doctor’s app examples are separate from these references; the institutions do not endorse the app.
- Royal Horticultural Society — How to grow peace lilies
- Clemson Cooperative Extension — Peace Lily
- University of Maryland Extension — Yellowing Leaves on Indoor Plants
- UC Statewide IPM Program — Houseplant Problems
- University of Illinois Extension — Keep houseplants happy with simple solutions
Drafted with AI from the sources below; each plant-specific fact checked automatically against its source on 24 October 2026.
This guide offers general plant-care information. A photo cannot confirm every cause; a local nursery or extension service can help with severe or unclear cases.