Why does my Calathea have yellow leaves?

Calatheas most often get yellow leaves from overwatering. Soggy soil starves the roots of oxygen and they start to rot, which shows first as soft, yellowing lower leaves. Natural aging of the oldest leaves and, less often, underwatering or too much direct sun can also cause it. Check the soil moisture first, then ease off watering.

Most likely cause

Overwatering is the top cause of yellow Calathea leaves. Calatheas like steady, light moisture but they will not tolerate sitting in wet soil, and roots deprived of air quickly begin to rot and fail to feed the leaves.

You can confirm it by the pattern. Overwatering yellows the lowest, oldest leaves first, the affected leaves feel soft rather than crispy, and the soil stays wet for days. If the pot has no drainage or sits in a full saucer, this is almost certainly the driver. Let the soil dry to the top inch and the yellowing should stop spreading.

Other causes

These rank below overwatering but often overlap with it.

Natural aging. A single old lower leaf yellowing slowly is normal; only the bottommost leaf is affected and the rest look healthy.
Underwatering. Prolonged drought stresses the roots; the soil is bone dry, leaves yellow alongside crispy edges, and the soil pulls from the pot.
Too much direct sun. Harsh light bleaches the foliage; look for pale yellow patches on the side facing the window.
Nutrient deficiency. Old, spent soil runs short on feed; the whole plant pales to an even yellow across many leaves.

How to fix it

Check the soil. Feel the top inch. If it is wet, hold off watering until it dries.
Improve drainage. Make sure the pot drains freely and empty any saucer so roots never sit in water.
Water consistently. Water when the top inch is slightly dry, using room-temperature filtered or distilled water.
Remove spent leaves. Cut fully yellow leaves at the base with clean scissors to redirect energy.
Adjust the light. Move the plant to bright indirect light, out of direct sun.
Refresh feeding. During active growth, feed at quarter strength every few weeks if the soil is old.

Cause	Tell-tale sign	Fix
Overwatering	Soft lower leaves, wet soil	Let top inch dry, improve drainage
Natural aging	Single oldest leaf only	Trim it, no action needed
Underwatering	Bone-dry soil, crispy edges	Water thoroughly, keep evenly moist
Direct sun	Pale patches facing window	Move to bright indirect light
Nutrient deficiency	Even pale yellowing overall	Feed at quarter strength

Frequently asked questions

Do yellow Calathea leaves turn green again?

No. Once a leaf yellows the chlorophyll is gone and it will not recover. Fix the cause, then remove the fully yellow leaf so the plant stops spending energy on it.

Is it normal for the bottom leaves to yellow?

Yes. The occasional oldest lower leaf yellows and drops as the plant grows, which is normal aging. Several leaves yellowing at once, or new leaves yellowing, points to a watering or light problem instead.

Should I cut off yellow Calathea leaves?

Yes, once a leaf is mostly or fully yellow. Use clean scissors and cut at the base of the stem. Removing it tidies the plant and redirects energy to healthy growth, but always fix the underlying cause first.

Can overwatering cause yellow Calathea leaves?

Yes, and it is the most common cause. Soggy soil starves the roots of oxygen and they begin to rot, which shows up as soft, yellowing lower leaves. Let the top inch dry before watering again.

Why are my Calathea leaves yellow but the soil is dry?

Dry soil with yellowing usually means underwatering or root damage that stops the plant taking up water. Water thoroughly until it drains, keep the soil lightly moist after that, and check the roots are firm and white.

How do I stop my Calathea leaves from turning yellow?

Water only when the top inch is slightly dry, use filtered or distilled water, and keep the plant in bright indirect light. Consistent moisture and stable conditions prevent most yellowing.