Why Are My Plant Leaves Turning Yellow?
Diagnose yellow houseplant leaves by checking watering, light, drainage, root stress, and recent environmental changes.
- Yellow leaves usually point to watering stress first
- Check whether the soil stays wet too long
- Review light, drainage, and temperature changes
- One old yellow leaf is normal, repeated yellowing is not
Most common cause: watering stress
Too much water is more common than too little, especially when decorative pots trap moisture. Constantly wet soil starves roots of oxygen and quickly shows up in leaf color.
Other common causes
Low light, temperature shock, compacted soil, and root crowding can all contribute. A plant can also drop older leaves naturally, so context matters.
What to inspect first
Start with the soil, then inspect the drainage setup and the position of the plant in the room. If decline continues, inspect the roots and recent care changes.
When yellowing is normal
A single older leaf yellowing from time to time is not a crisis. A pattern of multiple leaves yellowing, soft stems, or stalling growth is the stronger warning sign.
Best next move for beginners
Correct the watering pattern, improve drainage if needed, and avoid piling on fertilizer before fixing the root cause.
FAQ
Should I cut yellow leaves off? Yes, once they are mostly spent, but solving the underlying cause matters more.
Can low light cause yellow leaves? Yes. Weak light slows plant metabolism and makes overwatering more likely too.