Why are my Philodendron leaves turning yellow?

Philodendron leaves most often turn yellow from overwatering. Soggy soil starves the roots of oxygen and they begin to rot, which shows first as soft, yellowing lower leaves. Natural aging of the oldest leaves, too little light, and less often underwatering can also be to blame. Check the soil moisture first, then ease off watering.

Most likely cause

Overwatering is the top cause of yellow Philodendron leaves. Philodendrons are forgiving climbers that like their soil to dry out partway between drinks, and they will not tolerate constantly wet roots. When the soil stays saturated, roots are deprived of air, start to rot, and can no longer feed the foliage.

You can confirm it by the pattern. Overwatering yellows the lowest, oldest leaves first, the affected leaves feel soft and limp rather than crispy, and the soil stays wet for many days. If the pot has no drainage hole or sits in a full saucer, this is almost certainly the driver. Let the soil dry to the top inch or two 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 while the rest look healthy.
Too little light. In deep shade growth slows and older leaves yellow and drop; the plant looks leggy with long gaps between leaves.
Underwatering. Prolonged drought stresses the roots; the soil is bone dry, leaves yellow with crispy edges, and the soil pulls away from the pot.
Nutrient deficiency. Old, spent soil runs short on feed; the whole plant pales to an even yellow across many leaves, with newer leaves smaller.

How to fix it

Check the soil. Feel the top inch or two. If it is wet, hold off watering until it dries out.
Improve drainage. Make sure the pot drains freely and empty any saucer so the roots never sit in standing water.
Water on a feel test. Water thoroughly only when the top inch or two is dry, then let it drain completely.
Adjust the light. Move the plant to bright indirect light, out of both deep shade and harsh direct sun.
Remove spent leaves. Cut fully yellow leaves at the base with clean scissors to redirect energy to healthy growth.
Refresh feeding. During spring and summer growth, feed at quarter to half strength every 4 to 6 weeks if the soil is old.

Cause	Tell-tale sign	Fix
Overwatering	Soft lower leaves, wet soil	Let top inch or two dry, improve drainage
Natural aging	Single oldest leaf only	Trim it, no action needed
Too little light	Leggy growth, fading older leaves	Move to bright indirect light
Underwatering	Bone-dry soil, crispy edges	Water thoroughly, keep lightly moist
Nutrient deficiency	Even pale yellowing overall	Feed at quarter to half strength

Frequently asked questions

Will yellow Philodendron leaves turn green again?

No. Once a Philodendron leaf yellows the chlorophyll is gone and it will not turn back. Fix the cause, then trim the fully yellow leaf so the plant stops spending energy on it and pushes healthy new growth instead.

Is it normal for the bottom leaves of a Philodendron to turn yellow?

Yes. An occasional oldest lower leaf yellowing and dropping is normal aging as the plant grows. Several leaves yellowing at once, or new leaves yellowing, points to overwatering or a light problem rather than age.

Can overwatering cause yellow Philodendron leaves?

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

Why is my Philodendron yellow when the soil is dry?

Dry soil with yellowing usually means underwatering, or roots damaged from earlier overwatering that can no longer take up water. Water thoroughly until it drains, keep the soil lightly moist after that, and check the roots are firm and pale.

Should I cut off yellow Philodendron leaves?

Yes, once a leaf is mostly or fully yellow. Cut it at the base of the stem with clean scissors. This tidies the plant and redirects energy to healthy leaves, but always correct the watering or light cause first or more leaves will follow.

How do I stop my Philodendron leaves from turning yellow?

Water only when the top inch or two is dry, make sure the pot drains freely, and give it bright indirect light. Stable moisture and good drainage prevent most yellowing, since Philodendrons hate sitting in wet soil.