I noticed my own pothos by the east-facing kitchen window drop one yellow lower leaf, then another a week later. The bottom of the vine looked thin and bare. But the top kept pushing fresh green leaves the whole time. I typed yellow leaves plant dying into my phone in a small panic. The truth calmed me down fast. Yellow leaves rarely mean a plant is dying. Most of the time you are looking at natural leaf aging or a small care slip you can fix in days.
Here is what was really going on with my pothos, and with yours when you see the same thing. Plants drop old leaves on purpose, and they do it to feed themselves. As a leaf on your plant gets old, the plant pulls the nitrogen, magnesium, and other nutrients back out of it and ships them up to your new growth. The drained leaf turns yellow, then brown, then falls off. Botanists call this process senescence, and it is a normal, healthy part of how your plant grows.
So that vine was not sick at all. I checked the new leaves at the top each morning, and they kept opening green and firm. It was building those leaves out of parts it salvaged from the old ones. The bottom looked rough for a few weeks, but the steady green growth at the top told the real story. When your plant keeps making healthy new leaves, it is doing fine, even while it sheds a few tired ones at the base.
The pattern matters far more than the color you see. Before you ask yourself is my plant dying, look at where the yellow shows up on your plant and how fast it spreads. The grid below sorts the calm signs from the ones worth your closer look.
One or two old lower leaves turning yellow while your plant grows is nothing to fix. That is the plant doing its normal work, and you should leave it be. The picture changes when many leaves yellow at once or when the new growth at the top starts to fade. Fresh leaves should open and stay green. When they do not, something real is wrong, and now is the time to find the cause.
Give yourself about a week to watch two simple things before you do anything. First, check whether your new growth stays green as each leaf opens. Second, see whether the yellowing is spreading fast across the plant or sitting quietly on a couple of old leaves. If the fresh leaves look healthy and only a few old ones drop, your plant does not need help. Fussing over it now can stress it and make things worse, so step back and let it grow.
If the yellowing is spreading or hitting your new leaves, work through the common causes in order. Overwatering is the top culprit by far. Push a finger two inches into the soil and let it dry out before you water again. Next, check the soil pH, since the wrong range locks out iron and other nutrients even when they sit right there in the dirt. Last, look at feeding, because a plant short on nitrogen yellows from the bottom up and tells on itself.
So no, yellow leaves are not a death sentence for your plant. Watch the top, not the bottom. If your new growth stays green and only old leaves drop, you have a healthy plant doing exactly what it should. Step in only when the yellow spreads fast or climbs into the fresh leaves up top, and even then, you can usually turn it around.
Read the full article: Yellow Leaves on Plants: Causes and Fixes
