Why Does My Pothos Have Brown Spots? Causes & Fixes

By Sophia Martinez · January 24, 2026

Why Does My Pothos Have Brown Spots? Quick Answer

Brown spots on pothos (Epipremnum aureum) are typically caused by overwatering, underwatering, low humidity, excessive sunlight, or bacterial and fungal infections. The most common cause is overwatering, which leads to root rot and manifests as brown, mushy spots on leaves. Identifying the pattern and texture of the spots helps determine the exact cause and treatment.

Common Causes of Brown Spots on Pothos

Brown spots can appear due to various environmental and biological factors. Understanding each cause allows for targeted treatment and prevention.

1. Overwatering

Leads to root rot, reducing oxygen uptake.
Spots are usually soft, dark brown, and surrounded by yellow halos.
Soil remains soggy for days after watering.

2. Underwatering

Causes dry, crispy brown edges or tips.
Leaves may droop or curl.
Soil pulls away from pot edges.

3. Low Humidity

Pothos prefers 40–60% humidity.
Dry air causes leaf margins to turn brown and brittle.
Common in heated indoor environments during winter.

4. Excessive Sunlight

Direct sun burns leaves, causing pale brown or bleached spots.
Leaves may fade or develop scorched appearance.
Occurs when placed in south-facing windows without filtration.

5. Bacterial or Fungal Infections

Xanthomonas or Pythium cause angular, water-soaked lesions.
Spots may have yellow margins and spread rapidly.
Often introduced via contaminated tools or soil.

How to Diagnose the Cause: Visual Clues

The appearance of brown spots provides critical diagnostic information. Use this guide to identify the underlying issue:

Spot Type	Texture	Location on Leaf	Associated Conditions	Likely Cause
Soft, dark brown with yellow halo	Mushy	Center or base of leaf	Soggy soil, poor drainage	Overwatering / Root Rot
Crispy, light brown	Dry	Leaf tips or edges	Dry soil, infrequent watering	Underwatering
Brown, narrow margins	Brittle	Leaf edges only	Humidity <40%	Low Humidity
Pale brown, bleached	Dry, papery	Upper surface, sun-exposed areas	Direct sunlight exposure	Sunburn
Angular, water-soaked lesions	Wet, spreading	Between veins, random patches	High moisture, poor airflow	Bacterial/Fungal Infection

Table data source:1, 2

The table highlights key visual and environmental indicators that differentiate between care-related stress and pathogenic infections. For example, soft, spreading lesions point to microbial disease, while dry, marginal browning aligns with environmental stress like low humidity or inconsistent watering.

Treatment and Prevention Strategies

Once the cause is identified, take immediate corrective action to restore plant health.

For Overwatering

Stop watering until top 1–2 inches of soil are dry.
Repot in fresh, well-draining mix if roots are mushy or black.
Use pots with drainage holes and avoid saucers holding water.

For Underwatering

Water thoroughly until excess drains out.
Trim severely damaged leaves.
Establish a consistent watering schedule based on soil moisture.

For Low Humidity

Use a humidifier or place on a pebble tray with water.
Group plants to increase local humidity.
Avoid placing near heaters or AC vents.

For Sunburn

Move to bright, indirect light (e.g., east-facing window).
Use sheer curtains to diffuse intense sunlight.
Rotate plant weekly for even growth.

For Infections

Remove affected leaves with sterilized scissors.
Improve air circulation and reduce leaf wetness.
Apply copper-based fungicide if bacterial spot is confirmed.
Isolate infected plants to prevent spread.

Best Practices for Healthy Pothos Care

Prevention is more effective than cure. Follow these best practices to keep your pothos thriving:

Watering: Water every 1–2 weeks, allowing soil to dry between sessions.
Light: Provide bright, indirect light—never direct midday sun.
Humidity: Maintain 40–60% relative humidity.
Soil: Use a well-aerated mix (e.g., peat, perlite, pine bark).
Fertilizing: Feed monthly in spring/summer with balanced liquid fertilizer (N-P-K 20-20-20), diluted to half strength.

Frequently Asked Questions About Pothos Brown Spots

Can I cut off brown leaves on my pothos?

Yes, you can and should remove severely damaged or fully brown leaves using clean, sharp scissors. This helps redirect energy to healthy growth and prevents potential infection spread. Cut at the base of the petiole without damaging the main stem.

Is it normal for older pothos leaves to turn brown?

Some browning of lower, older leaves is natural as the plant ages. However, rapid or widespread browning, especially on new growth, indicates an underlying problem such as overwatering, pests, or nutrient imbalance.

How often should I water my pothos to prevent brown spots?

Water when the top 1–2 inches of soil feel dry—typically every 7–14 days depending on light and humidity. In low light, extend intervals. Always ensure excess water drains freely. Overwatering is the leading cause of brown spots.

Can low humidity cause brown spots on pothos?

Yes, pothos thrives in 40–60% humidity. Below 40%, leaf edges lose moisture faster than roots can replace it, leading to dry, crispy brown margins. Use a hygrometer to monitor levels and increase humidity with a humidifier or pebble tray.

Are brown spots on pothos contagious to other plants?

If caused by bacterial or fungal infections (e.g., Xanthomonas), yes—they can spread via water splash, tools, or hands. Isolate infected plants, disinfect tools with 70% isopropyl alcohol, and avoid misting to reduce transmission risk.