Monstera Leaves Turning Yellow: Causes and How to Fix Them

What a healthy Monstera looks like

Before you diagnose, know the baseline. A healthy Monstera deliciosa has deep green, glossy leaves held on firm petioles, with a new leaf unfurling every 4–6 weeks through spring and summer and growth slowing to a near stop in winter. Mature leaves develop splits and holes (fenestrations) once the plant is a couple of years old and gets enough light.

Aerial roots are normal. Brown, papery sheaths left behind by new leaves are normal. A single old leaf at the very base yellowing once or twice a year is normal too. Everything else in this guide is about yellowing that is not.

What yellowing looks like on a Monstera

Yellowing almost always starts on the largest, oldest leaves at the bottom of the plant. The blade fades from deep green to pale green, then to yellow, usually across the whole leaf rather than in patches.

Two things get confused with a problem. On variegated types such as ‘Thai Constellation’ or ‘Albo’, the cream and white areas are pigment, not damage; they are present from the day the leaf unfurls and their edges are crisp. And a new leaf that emerges light green is simply young. It darkens over two to three weeks.

Yellow that comes with brown mushy patches, a sour smell from the soil, or dozens of tiny pale speckles is the kind you need to act on.

Why Monstera leaves turn yellow

Overwatering is the number one cause. Monstera roots are thick and need air. In a dense, peaty potting mix that stays wet for a week, they suffocate and begin to rot, and the plant sheds its oldest leaves first. Big leaves lose water slowly, so a Monstera in a large pot can easily go 10–14 days between waterings in a normal living room.

Low light is the close second. A Monstera far from a window produces small, unsplit leaves and cannot support the big ones it already has, so it quietly retires them. Pale, even yellowing across several leaves, plus long stretches of bare stem between leaves, points to light.

Natural aging takes one leaf at a time. If a single leaf at the bottom yellows while everything above it is firm and green, the plant is recycling nutrients and nothing needs fixing.

Nutrient shortage shows up in plants that have been in the same soil for two years or more. Nitrogen shortage yellows the old leaves evenly. Magnesium shortage yellows between the veins while the veins themselves stay green.

Pests cause stippled or patchy yellow rather than whole-leaf yellow. Spider mites (Tetranychus urticae) leave fine speckling and webbing, thrips leave silvery streaks, and scale sits as brown bumps along the midrib. Check the undersides with a phone flashlight.

Cold and drafts below about 13 °C (55 °F), or a spot beside an air-conditioning vent, cause sudden yellowing that can take several leaves in a week.

Which pattern do you have?

What you see	Most likely cause
Oldest leaves yellow, soil still damp days after watering	Overwatering, possibly root rot
Several leaves pale yellow, new leaves small with no splits	Too little light
One bottom leaf yellow, everything else firm and green	Natural aging
Yellow between the veins, veins stay green	Magnesium or iron shortage
Tiny pale dots, fine webbing, or silvery streaks	Spider mites or thrips
Sudden yellowing after a cold night or a move	Cold shock or draft
Yellow leaf with soft brown patches and a sour soil smell	Root rot

How to fix a yellowing Monstera

1. Check the soil and roots first. Push a finger 5 cm (2 inches) into the mix. If it is wet, stop watering and slide the plant out of its pot. Healthy roots are white or tan and firm; rotting roots are brown, soft, and smell sour. Fix: cut away every mushy root with clean scissors and repot into a chunky aroid mix of roughly equal parts potting soil, orchid bark, and perlite. The full rescue is in root rot signs and how to save your plant.

2. Correct the watering rhythm. Water only when the top 5 cm (2 inches) of mix is dry, then water thoroughly until it runs from the drainage holes and empty the saucer. In winter this may mean once every 3 weeks. If you are not sure which direction you have been getting wrong, overwatered vs underwatered: how to tell walks through the tells.

3. Move it into brighter light. A Monstera wants bright, indirect light: within 1–2 m (3–6 ft) of an east- or west-facing window, or a little further back from a south-facing one. Direct midday sun scorches the leaves, but an hour or two of morning sun is fine. If a dim corner is your only option, a full-spectrum grow light for 10–12 hours a day makes a real difference.

4. Feed if the plant is hungry. In spring and summer, use a balanced liquid fertilizer at half the label strength every 2–4 weeks. For yellowing between the veins, one watering with Epsom salt (magnesium sulfate) dissolved at 5 g per litre often greens the leaves within a few weeks. Stop feeding from late autumn until growth restarts.

5. Treat pests if you found them. Wipe both sides of every leaf with a damp cloth, then spray with neem oil at 5 ml per litre of water plus a drop of dish soap, repeating every 5–7 days for 3 weeks. Scale comes off with 70% isopropyl alcohol on a cotton swab. Our guide to spider mites on houseplants has the complete protocol.

6. Remove leaves that are fully yellow. They will not recover. Cut the petiole close to the stem with clean scissors so the plant stops spending energy on them, and move on.

Preventing yellow leaves on a Monstera

Give the roots air. A chunky, fast-draining mix in a pot with drainage holes prevents most Monstera problems before they start. Terracotta helps if you tend to overwater; plastic or glazed pots help if you tend to forget.

Water by feel, not by calendar. A Monstera’s thirst swings hugely between a hot July and a dark January, and a fixed weekly schedule is how most of them end up with wet feet.

Give it something to climb. A moss or coco-coir pole lets the aerial roots anchor, and a climbing Monstera produces larger, better-split leaves that it is far less likely to shed.

Repot every 2 years in spring, one pot size up. A Monstera that has filled its pot with roots dries out unevenly and runs short of nutrients.

Wipe the leaves monthly. Dust cuts the light each leaf can use, and the wipe-down is when you will catch pests early.

When to use AI diagnosis

If your Monstera is yellowing on several leaves at once, or the pattern does not match a single row in the table above, snap a photo in the AI Plant Doctor app. You get an instant diagnosis and a treatment plan based on what the leaf actually shows, so you stop guessing between “water less” and “move it closer to the window.”