Why Are My Plant's Leaves Turning Yellow?

Updated 2026 · causes and fixes

Yellow leaves (chlorosis) are your plant waving a flag. The trick is reading which flag. Here are the six usual causes, most common first, and how to fix each.

1. Overwatering (the #1 cause)

Soggy soil suffocates roots. Signs: lower/inner leaves yellow, soil stays wet, maybe gnats. Fix: let the top 1–2 inches dry before watering again; make sure the pot drains.

2. Underwatering

Signs: yellowing with crispy brown edges, drooping, soil pulled away from the pot. Fix: water thoroughly until it runs out the bottom, then keep a consistent check.

3. Too little (or too much) light

Low light yellows lower leaves; harsh direct sun can bleach them. Fix: move to bright, indirect light for most houseplants.

4. Nutrient deficiency

Yellowing between green veins often means nitrogen or iron shortage, common in plants that haven't been fed or repotted in a long time. Fix: a balanced houseplant fertilizer at half strength during the growing season.

5. Normal aging

The occasional oldest, lowest leaf yellowing and dropping is normal. If it's just one here and there, don't panic.

6. Cold drafts or repotting stress

Sudden temperature swings or a recent move/repot can trigger yellowing. Fix: keep it away from vents and drafty windows and give it a couple weeks to settle.

Not sure which one it is?

This is exactly what Plant Parenthood is for — snap a photo and its AI diagnosis tells you the likely cause and the fix, and it sets a watering schedule so the most common culprit (overwatering) stops happening in the first place.

FAQ

Should I remove yellow leaves? If a leaf is more than half yellow it won't recover — trim it so the plant spends energy elsewhere.

Will yellow leaves turn green again? Usually not, but fixing the cause stops new ones from yellowing.