I once found a cluster of brown spots on one of my pothos leaves and immediately assumed the worst, root rot, some fungal disease, maybe both. Turned out I was overthinking it. The spots were dry and papery, not soft or spreading, which told me it was actually sunburn from a plant I’d recently moved closer to a window.

That’s the thing about brown spots on Epipremnum aureum, the cause can be anything from overwatering to bacterial leaf spot to plain old tap water, and each one looks slightly different if you know what to check.

This post walks you through how to read those clues, so you can pinpoint your cause and fix it without guessing.

Quick Answer: Diagnose Your Brown Spots by Look and Feel

Before working through every possible cause, touch the spot. Soft, wet, or spreading spots usually mean overwatering or a bacterial issue. Dry, crispy, papery spots point to sun exposure or underwatering.

If the spot has a yellow halo or a clearly defined border, fungal infection is the likely culprit. This one check narrows things down fast, so keep it in mind as you read through each cause below, since texture matters more than color alone when it comes to pinpointing what’s actually going on.

Overwatering and Root Rot

Soft, dark brown spots that feel mushy rather than dry usually trace back to overwatering, especially when they show up alongside yellowing leaves and soil that stays wet for days.

This happens because waterlogged soil starves roots of oxygen, and the damage eventually shows up in the foliage. If your spots are soft and your soil has been consistently damp, it’s worth checking the roots directly rather than treating the leaves alone.

Our full overwatered vs underwatered pothos guide and root rot guide walk through the complete diagnosis and fix.

Too Much Direct Sunlight (Sunburn)

Dry, papery brown patches, especially on leaves facing a bright window, are usually sunburn rather than disease. Pothos evolved as an understory plant, so even a few hours of harsh direct sun, particularly in the afternoon, can scorch leaf tissue faster than people expect.

Variegated varieties are especially vulnerable here. Golden Pothos, Manjula, and Snow Queen often show sunburn specifically on their lighter white, yellow, or cream sections, since those patches have less chlorophyll to protect them.

The fix is straightforward: move the plant a few feet back from direct light, or filter harsh sun with a sheer curtain rather than relocating entirely.

Pothos evolved as an understory plant

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Underwatering and Low Humidity

Dry, crispy brown edges and tips can also come from inconsistent watering or dry indoor air rather than sun exposure. The key difference from sunburn is location, underwatering-related spots tend to show up across the whole plant rather than concentrated on one sun-facing side.

If your soil has been drying out too much between waterings or your home runs dry in winter, this is likely your cause. For the full picture on watering consistency and curling as a related symptom, check our pothos leaves curling guide.

Bacterial Leaf Spot

Bacterial leaf spot has a distinct look: water-soaked lesions that start pale and swollen, then darken to brown and black, often with a yellow ring around the edges. Strains like Pseudomonas cichorii are usually behind it, and they spread through water sitting on leaf surfaces, most commonly from overhead watering or misting.

Once established, the spots continue expanding outward rather than staying contained.

The fix starts with changing how you water: direct water at the soil rather than the leaves, and avoid misting altogether if this becomes a recurring issue.

In more severe cases, isolating the plant from others helps prevent spread, since bacteria can travel through splashing water.

Fungal Leaf Spot

Fungal leaf spot shows up as circular or irregular brown to black spots, sometimes with tiny dark dots visible at the center under close inspection, these are the fungus’s fruiting bodies, commonly from genera like Cercospora or Phyllosticta.

Warm, humid conditions with poor air circulation create the perfect breeding ground, which is why this tends to flare up in crowded plant collections or overly humid rooms.

To treat it, remove affected leaves with sterilized scissors and dispose of them away from healthy plants. Improving airflow around your pothos helps prevent recurrence, and a copper-based fungicide or neem oil spray can knock back an active infection.

Overfertilization and Mineral Buildup

Brown tips and edges, particularly on otherwise healthy-looking leaves, often point to too much fertilizer rather than disease. Feeding too often or too heavily causes salt to build up in the soil, which damages roots and shows up as browning at the leaf margins.

Less commonly, manganese toxicity from certain fertilizer blends can cause spotting that closely resembles fungal or bacterial disease without actually being either one.

The fix is twofold: flush the soil thoroughly with water to clear out built-up salts, and scale back to feeding only every two to three months, diluted to half strength, during the active growing season.

Tap Water Sensitivity

Pothos can be surprisingly sensitive to what’s actually in your tap water. Chlorine, fluoride, and dissolved salts can accumulate in the soil over time and show up as brown tips or scattered spotting, even when your watering routine and light levels are otherwise fine.

This tends to develop gradually, making it easy to overlook as a cause. If nothing else on this list quite matches your situation, try switching to distilled water, or simply let tap water sit uncovered for 24 hours before using it, giving chlorine time to dissipate naturally.

Pests

Small brown or black spots paired with visible leaf deformation or stunted new growth often point to pests rather than disease. Spider mites, thrips, and scale insects feed by piercing leaf tissue and draining sap, and the damaged areas die off and darken as a result.

These pests are easy to miss since they often hide on the undersides of leaves or along stems. A close inspection under good light usually reveals them, sometimes alongside fine webbing or a sticky residue.

Treat with insecticidal soap or neem oil applied directly to affected areas, and repeat treatment every week or so until the infestation clears.

How to Treat Brown Spots

Once you’ve identified your cause, here’s the fix at a glance. Soft, wet spots with soggy soil: dry out the soil and check the roots. Dry, papery patches on sun-facing leaves: move away from direct light.

Dry spots across the whole plant: water more consistently or raise humidity.

Water-soaked spots with a yellow ring: switch to soil-level watering.

Spots with dark centers in humid conditions: remove affected leaves and improve airflow.

Brown tips with no other symptoms: flush the soil and cut back on fertilizer.

Gradual tip browning with no clear cause: try distilled or rested water.

Spots with deformed growth: check for pests on leaf undersides.

Preventing Brown Spots on Pothos

Most causes of brown spots come back to a handful of habits. Water at the soil line rather than overhead, and check moisture by feel before reaching for the watering can.

Keep your pothos in bright, indirect light, away from harsh direct sun and drafts alike. Fertilize lightly and infrequently, diluted and only during the growing season, rather than on a fixed habit.

Give plants enough space and airflow between them to prevent the humid, stagnant conditions fungal and bacterial spots thrive in.

And if tap water quality is a concern in your area, letting it rest for a day before watering is a small habit that prevents a slow, easy-to-miss problem.

Do brown spots on leaves mean overwatering?

Not always, though it’s one of the most common causes. Overwatering tends to produce soft, mushy brown spots alongside yellowing and soggy soil.

If your spots are dry and crispy instead, you’re more likely looking at sunburn, underwatering, or mineral buildup rather than too much water.

Should you cut off leaves with brown spots?

Yes, especially if the spots are spreading or the leaf is more than half affected. Damaged tissue won’t turn green again, and removing it redirects the plant’s energy toward healthy new growth.

Use clean, sterilized scissors, and cut fungal or bacterial cases well away from healthy leaves to avoid spreading anything further.

What about brown spots on pothos leaves in water?

Water-propagated cuttings can develop brown spots too, usually from bacteria growing in stagnant, unchanged water or from leaves sitting submerged and rotting. Change the water every few days, keep foliage above the waterline, and remove any affected leaves right away, since bacteria spreads quickly in standing water.

Are brown spots on pothos contagious?

It depends on the cause. Bacterial and fungal leaf spot can spread to nearby leaves or even other plants through water splashes or close contact, so isolating an affected plant is a smart precaution.

Spots from sunburn, mineral buildup, or fertilizer burn aren’t contagious at all, since they’re environmental rather than pathogen-based.

Will brown spots go away on their own?

The spots themselves won’t disappear or turn green again once the tissue is damaged. But once you fix the underlying cause, whether that’s watering, light, water quality, or feeding, new leaves should grow in clean. Trimming the affected leaves helps the plant look better right away while it recovers.

The Damage Is Done, The Plant Isn’t

Brown spots look alarming, but they’re rarely a mystery once you check texture and location. The damaged tissue won’t heal, but new growth will come in clean once you’ve fixed the cause.

If watering turned out to be the culprit, my overwatered vs underwatered pothos and root rot guides cover the rest.

Key Takeaways

• Texture tells you more than color. Soft, wet spots point to overwatering or bacteria. Dry, crispy spots point to sun, underwatering, or minerals. A yellow halo or defined border points to fungal infection.
• Overwatering and sunburn are the two most common causes, but they look opposite: soft and mushy versus dry and papery.
• Variegated varieties sunburn differently. Golden Pothos, Manjula, and Snow Queen often scorch specifically on their lighter, less-protected patches.
• Bacterial leaf spot spreads through wet foliage. Water-soaked, yellow-ringed lesions usually trace back to overhead watering or misting.
• Fungal leaf spot thrives on stagnant, humid air. Tiny dark dots at the spot’s center are a telltale sign, improve airflow to prevent recurrence.
• Not every cause is disease. Fertilizer buildup, manganese toxicity, and tap water chlorine or salts can all cause spotting without any pathogen involved.
• Existing spots won’t heal, but the plant will. Trim damaged leaves for appearance, fix the underlying cause, and new growth should come in clean.
• When in doubt, isolate first. Bacterial and fungal spots can spread to nearby leaves or plants, environmental causes like sunburn or minerals can’t.