Yellow leaves are one of the most common houseplant complaints — and one of the most useful diagnostic clues. Where the yellowing starts tells you a lot about what’s wrong.
What It Looks Like
Leaves turn pale yellow, sometimes starting at the edges or between veins. Older, lower leaves yellowing first is normal aging. Sudden yellowing across the plant — especially new growth — signals a problem.
Most Common Causes
- Overwatering — the number one cause. Soggy soil suffocates roots, and leaves yellow from the bottom up.
- Underwatering — leaves yellow, then crisp and brown at the edges. Soil pulls away from the pot.
- Too little light — the plant sheds leaves it can’t support. Move it closer to a window.
- Nutrient deficiency — uniform pale yellowing, often nitrogen. Feed during growing season.
What to Check First
Stick your finger 2 inches into the soil. If it’s wet and the leaves are yellow, you’re overwatering — let it dry out. If it’s bone dry, water thoroughly. Check light next: most yellowing plants are either drowning or starving for light.
Browse our Plant Emergencies guides for step-by-step fixes, or check Pests & Diseases if you spot spots, webs, or sticky residue along with the yellowing.