What does it mean when plant leaves turn yellow?
Plant leaves usually turn yellow because of too much water, too little water, not enough food, or the wrong amount of light. Less often, it's bugs, a sudden change like a cold draft or a move, a pot that's gotten too small, too much fertilizer, a plant disease (mostly outdoors), or a leaf that's simply old. The good news: it's almost always fixable, and you don't need to know anything about plants to figure out which one it is.
A leaf turns yellow when it loses its green, the part it uses to turn light into food. Plant people call this chlorosis. By far the most common cause is too much water: the University of Maryland Extension calls overwatering the number one reason indoor plants fail. So start there.
Not sure which one it is? Ask the Plant Doctor. A few quick questions, no plant knowledge needed. You'll get the likely cause, the fix, and whether your plant actually needs anything.
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On this page
- The 60-second check
- Match what you see to the cause
- The 9 causes of yellow leaves, and what to do about each
- What if the new leaves are yellow but the veins stay green?
- Yellow leaves on popular houseplants
- Yellow leaves on vegetables, fruit, and outdoor plants
- How long does it take a plant to recover from yellow leaves?
- 5 mistakes that make yellow leaves worse
- Yellow leaves FAQ
- Still not sure?
The 60-second check
No tools needed. Just your finger and your eyes.
- Poke the soil. Push your finger in up to the second knuckle, about 2 inches. Wet or soggy? Too much water. Dry as dust? Too little. Slightly damp? Water probably isn't the problem, so keep going.
- Look at which leaves are yellow. One or two old leaves at the bottom? Probably just old age. Lots of bottom leaves? Water or hunger. Only the newest leaves at the top? That's a different problem, covered below. Tiny dots or cobwebs? Bugs.
- Think back a month. Did you move it, repot it, or put it near a heater, AC vent, or drafty window? That's shock. Been feeding it a lot? Too much food. Haven't fed it in months, or ever? It's hungry. Roots poking out the bottom of the pot? It needs a bigger home.
Match what you see to the cause
Find the row that looks like your plant, then jump to the fix.
| What you see | The soil feels | What's going on |
|---|---|---|
| Bottom leaves yellow and soft or mushy | Wet | 1. Too much water |
| Leaves yellow, dry, and crispy | Bone dry | 2. Too little water |
| Older bottom leaves slowly fading pale, plant barely growing | Normal | 3. Hungry plant |
| Pale all over, stems stretching toward the window | Stays wet a long time | 4. Not enough light |
| Faded or brown patches on the side facing the window | Normal | 4. Too much sun |
| Just one or two of the oldest leaves, the rest look great | Normal | 5. Old age (normal) |
| Yellowing started after a move, a repot, or a draft | Normal | 6. Shock from a change |
| Tiny yellow dots, sticky leaves, or cobwebs | Normal | 7. Bugs |
| Yellow with brown, crispy tips and white crust on the soil | Normal | 8. Too much fertilizer |
| Roots poking out the bottom, soil dries out in a day or two | Dries fast | 9. Pot too small |
| Newest leaves yellow, but the veins stay green | Normal | Can't absorb iron |
| Spots, rings, or fuzz on leaves, spreading in wet weather | Often wet | Plant disease (outdoors) |
The 9 causes of yellow leaves, and what to do about each
1. Too much water (overwatering)
Too much water is the most common reason plant leaves turn yellow, and it usually happens because you care. Roots need air as much as water, and soil that stays soggy smothers them. The bottom leaves go yellow and soft. Left too long, the roots rot.
How to tell: The soil is still wet days after you watered, the yellow leaves feel soft, and the pot feels heavy when you lift it.
What to do: Put the watering can down. Wait until the soil is dry up to your second knuckle before you water again. Empty any water sitting in the saucer, and make sure the pot has a hole in the bottom. If the stems are mushy or the soil smells sour, the roots are rotting: take the plant out, cut off any black, mushy roots, and repot it in fresh, dry potting mix. Don't feed it. Plant food can't fix drowning roots.
2. Too little water (underwatering)
Too little water turns leaves yellow too. A thirsty plant pulls water from its older leaves to keep its new ones going, so the old ones dry up and yellow.
How to tell: The soil is dry all the way down, the pot feels light, and the yellow leaves are crispy or curled instead of soft.
What to do: Water slowly until water runs out of the hole in the bottom. After that, check the soil with your finger once or twice a week instead of guessing.
3. Hungry plant (not enough food)
A hungry plant yellows from the bottom up. Potting soil is like a fridge: it comes stocked, and after a few months it's empty. When food runs low, the plant takes nutrients from its oldest leaves to feed its new ones, so the bottom leaves fade to pale yellow first.
How to tell: Watering and light seem fine, you haven't fed the plant in 3 months or more (or ever), and it has mostly stopped growing.
What to do: First make sure it isn't a water or light problem, since food won't fix either one. Then feed it once a month in spring and summer. For most houseplants, SCRIPTS makes it simple: rip open one packet, pour it into 32 oz of water, and use that for one normal watering. No measuring, no guessing. For citrus, figs, and other plants with their own GrowScripts formula, use that one instead. Leaves that are already yellow won't turn green again, but new leaves should come in healthy within 4–6 weeks.
4. Wrong light: too little or too much
Plants eat light. In a dim corner, a plant can't make enough energy to keep every leaf, so it lets some go. In hot, direct sun, leaves that aren't used to it get sunburned.
How to tell: Too little light shows up as stems stretching or leaning toward the window, pale new leaves, and soil that stays wet longer than it used to. Too much sun shows up as faded yellow or brown patches on the leaves facing the window, often right after a move to a sunnier spot.
What to do: For too little light, move the plant closer to a bright window, and water less until it's in the brighter spot, since a plant in low light drinks less. For too much sun, pull it back from the glass or put it behind a sheer curtain. Sunburned spots won't heal, but new leaves will grow in fine.
5. Old age (totally normal)
Some yellow leaves are just old. Every leaf has a lifespan, and a plant losing one or two of its oldest bottom leaves now and then is as normal as you losing a few hairs.
How to tell: Only the oldest leaves at the bottom are yellow, and the rest of the plant looks healthy and is still putting out new leaves.
What to do: Nothing. Pull the leaf off once it's fully yellow.
6. Shock from a sudden change
A sudden change can turn leaves yellow, because most houseplants come from the tropics and don't like surprises: a cold draft, a heating or AC vent, a move to a new spot, or a new pot.
How to tell: Timing. The yellowing started within a few weeks of a move or a repot, or the plant sits near a drafty window, a door, or a vent.
What to do: Pick one spot with steady light and a temperature between 60 and 85°F, and leave the plant there. Give it 3–4 weeks to settle before you feed it or move it again, since every new change is another shock.
7. Bugs (pests)
Bugs turn leaves yellow by feeding on them. Tiny sap-suckers like spider mites, mealybugs, and scale drain the leaves, leaving yellow dots or patches.
How to tell: Look under the leaves. Tiny yellow dots, sticky spots, fine cobwebs, or little tufts of white fluff all mean bugs.
What to do: Move the plant away from your other plants. Wipe the leaves with a damp cloth, then rinse the whole plant in the shower. If there are a lot of bugs, spray it with insecticidal soap from any garden store.
8. Too much fertilizer
Too much plant food turns leaves yellow as well. More isn't better: extra fertilizer builds up in the soil like salt and burns the roots.
How to tell: The leaves are yellow with brown, crispy tips, and there's sometimes a white crust on top of the soil or around the rim of the pot.
What to do: Flush it out: run plain water through the pot, about twice the pot's size in water, and let it all drain. Skip feeding for a month, then stick to one measured dose a month. Pre-measured SCRIPTS packets make it hard to overdo.
9. Pot too small (root-bound)
A plant that has outgrown its pot turns yellow because its roots have filled the pot, leaving barely any soil to hold water and food. The soil dries out in a day or two, and the older leaves yellow.
How to tell: Roots poke out of the hole in the bottom or circle the top of the soil, water runs straight through, and you're watering far more often than you used to.
What to do: In spring, move it to a pot just 1–2 inches wider, with fresh potting mix. A much bigger pot holds too much wet soil. Wait 3–4 weeks before feeding so the roots can settle in.
What if the new leaves are yellow but the veins stay green?
This one looks different: the newest leaves at the top turn yellow, but the little lines running through them, the veins, stay green. It means the plant can't absorb iron. Plant people call this interveinal chlorosis.
Usually the iron is in the soil. The plant just can't get to it. Hard tap water slowly changes the soil so roots can't absorb iron, and old, packed-down potting soil makes it worse. So more fertilizer isn't automatically the answer.
What to do: Repot into fresh potting mix, which often fixes it on its own. If your tap water leaves white spots on your faucets, that's hard water, so water with filtered water or rainwater instead. In spring and summer, use a plant food that includes iron. If new leaves still come in yellow after a couple of months, the plant may need an iron-specific product.
For the curious: which leaves turned yellow first?
Plants can move some kinds of food around inside themselves and not others, so where the yellow starts is a clue. If the oldest leaves yellow first, the plant is moving food from its old leaves to its new ones, which points to nitrogen, magnesium, or potassium. If the newest leaves yellow first, the plant can't move that food, which points to iron or sulfur.
| Plant food | Yellow starts on | What it looks like |
|---|---|---|
| Nitrogen | Oldest, bottom leaves | Whole leaf fades evenly to pale yellow, then works up the plant |
| Magnesium | Oldest leaves | Yellow between the veins, veins stay green |
| Potassium | Oldest leaves | Edges turn yellow, then brown; the middle stays green |
| Iron | Newest leaves at the top | Yellow between the veins, veins stay green |
| Sulfur | Newest leaves | Whole leaf evenly pale yellow |
You don't need to work out which one it is. A complete plant food once a month in spring and summer covers all of them.
Yellow leaves on popular houseplants
Some plants have a usual suspect. If yours is here, start with its most likely cause.
| Plant | Most likely cause | What to check first |
|---|---|---|
| Pothos | Too much water | Wait until the soil is dry up to your second knuckle. A few yellow leaves at the base of long vines are normal. |
| Hibiscus | Uneven watering, or a move like coming indoors for winter | Keep watering steady, and check under the leaves for tiny bugs and cobwebs (spider mites). |
| Orchid | An old bottom leaf, or too much water | Check the roots: firm and green or silver is healthy; mushy and brown means too much water. |
| Lemon and other citrus | Hungry, since citrus are big eaters | Feed during spring and summer, and use the table above to see which food it's short on. |
| Peace lily | Too much or too little water | It droops dramatically when thirsty. If it's droopy but the soil is wet, it has too much water. |
| Money tree | Too much water, often in a pot with no hole | Make sure the pot drains, and water only when the top few inches are dry. |
| Gardenia | Can't absorb iron | Gardenias need acidic soil. Yellow leaves with green veins mean the soil isn't acidic enough. |
| Monstera | Too much water, or not enough light | One yellow bottom leaf is normal. Several means it's time to check the soil and the light. |
| ZZ plant | Too much water | It stores water in potato-like parts under the soil, so water only when the soil is completely dry. |
| Snake plant | Too much water | Soft, mushy yellow leaves mean too much water. See our snake plant care calendar. |
| Fig tree | Watering, or normal fall leaf drop | Outdoor figs drop their leaves every fall, and that's normal. See our fig tree care calendar. |
Yellow leaves on vegetables, fruit, and outdoor plants
Outside, the same 9 causes apply, plus one more: plant diseases like blight and mildew, which spread in wet weather. Sick leaves usually have spots, rings, or fuzz, so look closely before you feed or water.
| Plant | Most likely cause | What to check first |
|---|---|---|
| Tomato and potato | A disease called early blight, or hungry | Brown spots with rings like a target on the bottom leaves mean blight: pick off those leaves, mulch around the plant, and water the soil, not the leaves. Pale bottom leaves with no spots mean it's hungry. |
| Cucumber | Hungry, too much water, or downy mildew | Yellow patches boxed in by the veins, with gray fuzz underneath, mean downy mildew. Pick off sick leaves and water at the base. |
| Squash and zucchini | Too much water, powdery mildew, or squash vine borers | White powder on the leaves is mildew. If the plant suddenly wilts and there are holes and sawdust-like bits at the bottom of the stem, it's vine borers. |
| Hydrangea | Soggy soil, or can't absorb iron | Yellow leaves with green veins mean the soil isn't acidic enough. Yellowing in fall is normal. |
| Rose | A disease called black spot, or heat and dry spells | Black spots with feathery edges, then yellow leaves falling off, mean black spot. Rake up fallen leaves and water the soil, not the leaves. |
| Tree | Normal fall color, or can't absorb iron | Yellow leaves with green veins in summer, common on pin oaks and maples, mean the soil is blocking iron. Dry spells and root damage from digging are the other usual causes. |
| Pepper | Too much water, or hungry | Check that the soil drains. Yellow between the veins on older leaves means it's short on magnesium. |
| Boxwood and arborvitae | Winter damage, soggy soil, or normal fall shedding | Arborvitae shed some inner needles every fall. Yellowing on the side that faces winter wind or sun is winter damage. |
| Basil | Too much water, cold nights, or downy mildew | Basil yellows when nights drop below 50°F. Yellow between the veins with gray fuzz underneath means downy mildew. |
| Blueberry | Soil that isn't acidic enough | Blueberries need acidic soil. Yellow leaves with green veins mean they can't absorb iron. |
| Strawberry | Too much water, or leaf spot | Small spots with purple edges are a disease called leaf spot. Otherwise, check that the soil drains. |
| Bean | Too much water, or the end of the season | Beans yellow naturally as they finish producing. Blotchy yellow-and-green leaves point to a virus. |
How long does it take a plant to recover from yellow leaves?
Yellow leaves won't turn green again, so watch the new leaves instead. Once you've fixed the problem, here's what to expect:
| What was wrong | What to expect |
|---|---|
| Too little water | Perks up within a day of a good soak |
| Too much water | New healthy leaves in 2–4 weeks if the roots were still firm; longer if they'd started to rot |
| Hungry | New green leaves within 4–6 weeks of regular feeding |
| Wrong light | Fuller, greener new growth within 3–6 weeks |
| Shock from a change | Settles in 2–4 weeks if you leave it in one spot |
| Bugs | Treat every 5–7 days for 3–4 weeks to catch the ones that hatch later |
| Too much fertilizer | Healthy new growth 3–4 weeks after flushing |
| Pot too small | New growth 3–6 weeks after repotting |
| Can't absorb iron | New leaves come in green over 1–2 months |
5 mistakes that make yellow leaves worse
- Watering on a schedule. Plants drink less in winter and in dim spots. Check the soil with your finger instead of the calendar.
- Feeding a stressed plant. A soggy, just-repotted, or just-moved plant can't use extra food, and fertilizer can burn weak roots.
- Moving it around to "fix" it. Every move is a new shock. Pick the best spot and leave it there for a few weeks.
- Repotting into a huge pot. Extra soil stays wet too long. Go just 1–2 inches wider.
- Pulling off every yellow leaf at once. Take off no more than about a third of the leaves at a time, so the plant can still make energy.
Yellow leaves FAQ
Can yellow leaves turn green again?
Usually not. Once a leaf is fully yellow, the plant has already pulled what it needs out of it. The exception is mild yellowing from an iron problem, which can partly green up once it's fixed. Either way, fix the cause, and the new leaves will come in green.
Should I cut off yellow leaves?
Yes, once they're mostly yellow. Pull gently or snip at the base with clean scissors. A half-yellow leaf can stay until it's done, since the plant is still getting something from it. Don't take off more than about a third of the leaves at once.
Does a yellow leaf mean my plant needs fertilizer?
No, and this is the most common mistake. Food only fixes a hungry plant. If the soil is wet or the plant is in a dim spot, fertilizer won't help, and too much of it causes yellow leaves on its own. Check water and light first.
Is it overwatering or underwatering?
Feel the soil and the leaf. Too much water means soft, limp leaves, wet soil, and a heavy pot. Too little means dry, crispy, or curled leaves, dry soil, and a light pot.
Why are my plant leaves turning yellow with brown spots?
Brown spots with a yellow ring around them usually mean a leaf disease, often from water sitting on the leaves or soil that stays wet. Pick off the worst leaves, water the soil instead of the leaves, and give the plant more air around it. Dry brown patches on the side facing a window are sunburn instead.
Why are the bottom leaves on my plant turning yellow?
Look at the rest of the plant. One old bottom leaf now and then is normal. Several soft yellow bottom leaves and wet soil mean too much water. Bottom leaves slowly fading pale while the plant stops growing mean it's hungry.
Why are the new leaves on my plant turning yellow?
If the veins stay green, the plant can't absorb iron. See the green-veins section above: fresh potting mix often fixes it.
Why are my plant leaves turning yellow even though I water it?
The watering may be the problem. If the soil never dries out between waterings, the roots are drowning. If that's not it, check the light, whether the pot drains, recent moves, bugs, and how often you've been feeding.
Why are my plant leaves turning yellow after repotting?
A few yellow leaves after repotting are normal shock. Keep the plant in one spot with steady light, water only when the top of the soil is dry, and wait 3–4 weeks before feeding.
Is it normal for leaves to turn yellow in winter?
A few, yes. Shorter days mean less light, so plants grow slower and drink less. Too much water is the most common winter problem, so water less often from fall through early spring.
Still not sure?
Yellow is a symptom, not a diagnosis. The Plant Doctor asks a few quick questions about what you see, how the soil feels, and what's changed. You'll get the likely cause, the fix, and a GrowScripts product only if your plant actually needs one.