Home › Yellow leaves

Why are my plant's leaves turning yellow?

Diagnosis and fixes verified against university horticulture extension guidance on 1 August 2026. Sources linked below.

Yellow leaves almost always come down to five causes: too much or too little water, the wrong light, a nutrient shortage, pests, or ordinary aging. The trick is not knowing the list. It is working out which one is yours.

The pattern on the plant tells you the cause. Which leaves yellowed, where the yellow sits on each leaf, and what the soil is doing narrow five suspects down to one. Start with the table below, then read the section for your match to confirm it and fix it.

Which leaves are yellow, and does the pattern matter?

Which leaves are yellow and what pattern they show is the fastest way to name the cause, because different problems mark a plant in different places. Read three things before you treat anything.

• Position. Oldest and lowest leaves yellowing points to aging, overwatering, or a nitrogen shortage. The youngest upper leaves yellowing points to an iron or micronutrient problem instead.
• Pattern on the leaf. A leaf that yellows evenly all over suggests water, light or nitrogen. A leaf that stays green along the veins while yellowing between them is classic chlorosis from a micronutrient shortage.
• The soil and the company it keeps. Wet soil with soft leaves and small flies means too much water. Dry soil with crisp edges and wilting means too little. Speckles and webbing mean pests. If the plant is drooping as well as yellowing, see the full wilting and drooping guide.

Those three reads separate the water problems from the light, nutrient and pest problems, which is where most people guess wrong. Start with water, because it is the most common of all.

Is overwatering or underwatering turning the leaves yellow?

Overwatering and underwatering both turn leaves yellow, and they are the most common cause by a wide margin, so rule water in or out first. The two look different once you know where to look: overwatering gives soft yellow leaves in wet soil, while underwatering gives yellow leaves with dry, crispy edges in dry soil. If the edges are crispy but the leaf itself is not yellowing, see the full brown and crispy leaves guide, since humidity and salt build-up cause that pattern without the yellowing.

Overwatering is the more dangerous of the two. Soil that stays wet leaves no air around the roots, they begin to rot, and a rotting root system cannot feed the plant, so the leaves yellow even though the soil is full of water. Check by feeling the soil a couple of days after watering: if it is still wet and the lower leaves are soft and yellow, ease off and let it dry before the next drink. Underwatering is simpler to fix. Dry soil, a pot that feels light, and yellow leaves with brittle edges mean the plant needs a thorough soak until water runs from the base. Once you have ruled water in or out, look up at the light.

Can too much or too little light turn leaves yellow?

Both too much and too little light turn leaves yellow, in two patterns you can tell apart. Too little light yellows the lower and inner leaves as the plant drops foliage it can no longer power, and growth turns leggy and thin. Too much direct sun bleaches yellow or pale patches onto the leaves that face the window, a kind of sunburn on the sun-facing side.

The fix follows the pattern. A plant yellowing in a dim corner wants a brighter spot with bright, indirect light. A plant with scorched patches on one side wants to move back from the harsh direct sun that is bleaching it. See the full light guide for the shadow test and how to read your room. Light problems are slow, so give a moved plant a few weeks before you judge the result, and while you wait, consider whether the soil is simply running out of food.

Do yellow leaves mean a nutrient deficiency?

Yellow leaves can mean a nutrient deficiency, and the position of the yellowing says which nutrient is short. A pot holds a limited amount of soil, nutrients run out as the plant grows, and the plant then moves what little it has to the leaves that matter most, which is why the pattern is readable.

• Old leaves first, whole plant paling. Nitrogen is mobile, so a short plant pulls it out of its oldest leaves to feed new growth, yellowing the bottom of the plant first. This often pairs with a plant that is pot-bound and has not been fed in months.
• New leaves yellow with green veins. Iron and some other micronutrients do not move within the plant, so a shortage shows on the youngest leaves as yellow between still-green veins. Waterlogged or very alkaline soil can lock iron away even when it is present.

Feed during active growth with a diluted liquid fertiliser, and repot a pot-bound plant into fresh mix one size larger so its roots have room and food again. If feeding does not explain the pattern, check the leaves closely for something feeding on them.

Can pests turn plant leaves yellow?

Pests turn plant leaves yellow by feeding on them, draining the sap that keeps a leaf green. Spider mites are the common culprit indoors: they leave tiny yellow speckles, called stippling, and fine webbing where the leaf meets the stem. Aphids and mealybugs suck sap too, leaving yellowing along with sticky residue or small clusters of insects.

Check the undersides of the leaves and the leaf joints, since that is where these pests hide. Isolate an affected plant so the problem does not spread, wipe or rinse the pests off, and inspect any new plant before it joins the others, because that is how most infestations arrive. If there are no pests and the yellowing is only low down and slow, the cause may be nothing to fix at all.

Is it just natural aging?

Sometimes yellow leaves are just natural aging, and that needs no fix. A plant sheds its oldest, lowest leaves over time as it puts energy into new growth, so one or two yellowing leaves at the very bottom of an otherwise healthy plant are normal. The tell is that only the oldest leaves are affected, the change is slow, and nothing else looks wrong.

Aging becomes a problem only when it is not really aging: several leaves yellowing at once, new leaves yellowing, or yellowing alongside wet soil, wilting or pests all point back to one of the causes above. Once you know which cause you are dealing with, the fix is straightforward.

How do I fix yellow leaves, and will they turn green again?

You fix yellow leaves by correcting the cause, not the leaf, because a leaf that has fully yellowed does not turn green again. It has lost its chlorophyll for good, so the recovery you are looking for is healthy new growth, not the old leaf coming back. Match the fix to what you found:

Remove any leaf that is more than half yellow, since it cannot recover and the plant is still spending energy on it. Then watch the new growth: green, healthy new leaves are the sign the fix worked.

FAQ

Do yellow leaves turn green again?

A fully yellow leaf rarely turns green again, because it has lost the chlorophyll that makes it green. Fix the cause and judge recovery by the new growth. A only-slightly-yellow leaf can sometimes partly re-green after feeding, but a leaf that is yellow all over is spent.

Should I cut off yellow leaves?

Remove a leaf that is more than half yellow with clean scissors, cut at the base, because it cannot recover and still draws energy. Leave a barely-yellow leaf if the plant is reclaiming nutrients from it, which is normal on old lower leaves.

Is one yellow leaf normal?

One yellow leaf low on a healthy plant is usually normal aging. Worry when several leaves yellow at once, when new leaves yellow, or when yellowing comes with wet soil, wilting or visible pests.

Related guides

Sources

• University of Wisconsin Horticulture Extension, Houseplant Care.
• University of Missouri Extension, Caring for Houseplants.
• Royal Horticultural Society, Houseplants.