Why does my pothos have brown spots?

The 4 most likely causes

The cause of pothos brown spots usually narrows to one of the items below, ranked by how often we see each in Growli's diagnostic chats. Work down the list — most readers find their answer in the top two.

1. Fungal or bacterial leaf spot (Possible)
   Brown spots with yellow halos appearing on pothos, especially after water sat on the leaves overnight, are most often fungal or bacterial leaf spot. Remove affected leaves, water only at the soil line, improve airflow, and apply a copper fungicide if it spreads.
2. Sunburn or intense direct sun (Possible)
   Bleached patches, papery brown spots, or crisped leaf surfaces on the south-facing side of pothos are sunburn. Acclimatise it more gradually after a move, or filter midday sun with a sheer curtain. Sunburn damage doesn't heal — wait for new growth.
3. Overwatering or poor drainage (Likely)
   In most homes overwatering is more often a drainage problem than a frequency problem. Pothos needs a pot with a drainage hole, a chunky free-draining mix, and a watering rhythm of when the top half of the soil is dry, every 7-10 days. Soggy soil drowns the roots and the first symptom you see above ground is yellowing or wilting foliage.
4. Pests sucking sap (Possible)
   Sap-sucking pests (aphids, spider mites, mealybugs, scale) all cause similar symptoms: yellow stippling, distorted new growth, sticky residue. Inspect leaf undersides and stem joints with strong light. Most are controlled with weekly insecticidal soap or a horticultural oil spray.

Why pothos in particular

Coming from warm, humid forest, pothos rarely spots on its own, so discrete brown patches usually arrive with cold. A leaf pressed against a winter windowpane, or a draught from a nearby door, chills the tissue and leaves dark, water-soaked marks that later dry brown. Splashy watering that leaves foliage wet overnight can invite a fungal fleck too. Patches ringed in yellow that spread suggest infection; dry, static marks after a cold night usually do not.

Normal turnover, or real trouble?

Unlike species that freckle with age, a healthy pothos leaf stays cleanly green, so there is no routine spotting to shrug off. The reassuring kind is a mark that showed up once after a cold night against the glass and has not changed since. Draw a mental outline: a spot the same size next week is old cold damage; one that has widened or grown a yellow halo is spreading and wants acting on.

How to diagnose in 60 seconds

Run these quick checks before you change anything — the right fix depends on what you find.

• Are the spots dry and crisp or wet and spreading? Crisp = sunburn, fluoride, or old damage; wet = active fungal or bacterial spot.
• Do the spots have a yellow halo? Halos are classic for bacterial and fungal leaf spot.
• Are they only on the sunny side of the plant? That points to sunburn.
• Are the leaf tips uniformly brown while the rest is healthy? Crispy tips on pothos usually mean low humidity or tap-water minerals.

The fix — step by step

Start by moving the vine off the cold windowsill and out of the door draught that chilled it, giving new growth a stable, warmer spot. If a spot is spreading with a yellow ring, snip that leaf off at the node with clean scissors, bin it, and let the foliage dry between waterings rather than misting or splashing the leaves. Better air movement around this jungle vine does more than any spray at this stage.

This is the recovery sequence Growli walks users through for pothos with brown spots. Work through the steps in order; skipping ahead is the most common reason a plant fails to bounce back.

1. Quarantine if you suspect disease. If spots look wet, are spreading, or have a yellow halo, move pothos away from your other plants until you have a diagnosis. Disinfect your tools between plants.
2. Remove the worst-affected leaves. Snip off heavily spotted leaves at the base. Don't compost them — bag and bin to stop spore spread. Never remove more than 30% of foliage in one go.
3. Switch to filtered or rain water. If you suspect tap-water damage, water with rainwater, distilled water, or tap water that has stood uncovered for 24 hours. Continue for 4-6 weeks before re-evaluating.
4. Improve airflow and watering technique. Water at the soil line only — never on the leaves. Space pothos so leaves are not touching neighbouring plants. A small fan in stagnant rooms makes a surprising difference.
5. Apply a treatment if needed. For active fungal spread, a copper-based fungicide applied weekly per the label is the standard remedy. For sunburn or fluoride damage, no treatment helps — just remove damaged leaves and wait for new growth.

When this can't be saved

Most cases of pothos brown spots are recoverable, but a few red flags point to a plant that has gone past the point of return. If you spot any of these, consider propagating a clean cutting and starting over.

• Spots are spreading by several per day across multiple leaves — active aggressive disease.
• The whole crown of the plant is blackening from a central point outward.
• Healthy-looking neighbouring plants are starting to show the same symptoms.

Prevention

For pothos, the single biggest preventative is matching its native rhythm: when the top half of the soil is dry, every 7-10 days, medium to bright indirect light, and a free-draining pot with a working drainage hole. Water at the soil line, not the leaves, especially in the evening when leaves can't dry before nightfall. Switch to filtered or collected rainwater for sensitive species — it pays for itself in fewer crispy edges. Improve airflow around densely planted shelves with a small clip-on fan.

Common questions

Related guides

• What's wrong with my plant? — the diagnosis apps compared
• Pothos care guide — full watering, light, and feeding routine
• Is pothos toxic to cats and dogs? — toxic to pets, per the ASPCA
• How often to water pothos — the watering brief
• When to repot pothos — pot size and timing
• Brown spots on plants — the full diagnostic guide across species
• What's wrong with my plant? — Growli's flagship diagnosis index
• Pothos — yellow leaves
• Pothos — curling leaves
• Pothos — drooping
• Monstera — brown spots