Why are my plant's leaves turning yellow?

The most common cause is overwatering — soggy soil starves the roots of oxygen and the lower leaves yellow first. Other causes are underwatering, too little or too much light, a nutrient shortage, and simple old age. Check the soil moisture first, as it explains most cases.

Should I remove yellow leaves?

If a leaf has turned mostly yellow it will not turn green again, so you can remove it to redirect the plant's energy. Fix the underlying cause first, or new leaves will yellow too. Snip cleanly at the base rather than pulling.

Do overwatered and underwatered plants both get yellow leaves?

Yes, which is why you must check the soil. Overwatered plants have wet soil, soft stems, and may smell sour; underwatered plants have dry soil, crispy edges, and perk up after a drink.

Troubleshooting

Why are my houseplant's leaves turning yellow?

Published May 31, 2026

Yellow leaves are a plant’s all-purpose distress flare. They can mean half a dozen different things — which is why “why is my plant yellow?” has no single answer. The trick is to read the pattern: which leaves, how fast, and what the soil is doing. Work through these in order and you will usually find the culprit.

1. Overwatering (the usual suspect)

If the lower, older leaves yellow first, the stems feel soft, and the soil is wet, you are almost certainly overwatering. Soggy soil drives the air out and the roots effectively suffocate. Fix: let the soil dry out, make sure the pot drains, and water less often. This is the number-one cause — check it first.

2. Underwatering

Bone-dry soil, crispy edges alongside the yellowing, and a plant that perks up within hours of watering point to under-watering. Fix: soak thoroughly and settle into a more consistent rhythm.

3. Light, too little or too much

Too little light makes leaves pale and yellow evenly as the plant gives up on foliage it can’t power. Too much harsh sun bleaches leaves to a washed-out yellow with possible scorch. Fix: match the plant to the right light — bright and indirect for most.

4. Nutrient shortage

Yellowing between green veins, especially on newer leaves, suggests a nutrient deficiency — common in plants that haven’t been fed or repotted in a long time. Fix: feed with a balanced fertiliser during the growing season, and refresh the soil if it is exhausted.

5. Natural aging

A single old leaf at the base turning yellow and dropping, while the rest of the plant looks great, is just normal. Plants shed their oldest leaves. Fix: nothing — remove it and move on.

6. Stress, cold, or pests

A recent repot, a cold draught, or a pest infestation can all trigger yellowing. Check the undersides of leaves for spider mites or scale, and keep plants away from cold windows and heating vents.

A 30-second diagnostic

Clue	Most likely cause
Wet soil, soft stems, lower leaves	Overwatering
Dry soil, crispy edges, perks up after water	Underwatering
Pale and even, leggy growth	Too little light
Bleached, scorched patches	Too much direct sun
Yellow between green veins, new leaves	Nutrient shortage
One old leaf at the base	Natural aging

Should you cut yellow leaves off?

A leaf that has gone mostly yellow will not recover, so you can remove it to let the plant focus on healthy growth — but fix the cause first, or the next leaves will follow. Snip cleanly at the base.

The honest summary

Yellow leaves are information, not a verdict. Check the soil, read which leaves are affected, and match the pattern above. Nine times out of ten, the answer is “water less.”

Because overwatering hides behind a watering-too-often habit, LeafPal spaces each plant’s reminders to its real needs — the simplest way to stop the most common cause of yellow leaves before it starts.