Monstera Monstera deliciosa
Why Is Your Monstera Turning Brown? Causes and Fixes
Quick Answer
Quick answer: Your Monstera is turning brown because of one of six common issues: low humidity, overwatering, underwatering, direct sunlight, overfertilizing, or mineral buildup in tap water. The fix depends on where the browning appears and what the texture feels like.
| Botanical name | Monstera deliciosa |
|---|---|
| Light | 6-8 hours bright indirect light daily; tolerates low light but grows faster in bright indirect conditions; avoid direct |
| Watering | Water when top 2-3 inches of soil are dry; every 1-2 weeks typically; summer 7-10 days, winter 2-4 weeks |
| Humidity | Above 50%; ideally 60% or higher; use pebble tray or humidifier; avoid misting |
| Temperature | 65-85°F (18-29°C); avoid temperatures below 55°F (13°C) and cold drafts |
| Soil | Well-draining, chunky mix with perlite and orchid bark; neutral to slightly acidic pH 5.5-7 |
| Feeding | Balanced water-soluble fertilizer every 2-4 weeks during spring and summer growing season |
| Size | Up to 8-10 feet tall indoors; leaves up to 2 feet wide |
| Difficulty | easy |
| Cats | ⚠️ toxic — Calcium oxalate crystals cause mouth irritation, drooling, vomiting |
| Dogs | ⚠️ toxic — Calcium oxalate crystals cause mouth irritation, drooling, vomiting |
What’s Causing the Brown Leaves
| What you see | Likely cause | What to do |
|---|---|---|
| Brown leaf tips and edges, papery texture | Low humidity | Use a pebble tray or humidifier to raise humidity above 50% |
| Dark brown or black patches, soft stems, wet soil | Overwatering / root rot | Let soil dry completely; trim mushy roots and repot into fresh aroid mix |
| Light brown edges, drooping leaves, dry soil | Underwatering | Water more frequently; check soil moisture every few days |
| Brown scorched patches on exposed leaves | Direct sunlight | Move plant away from direct rays but keep it near a window |
| Black and brown spots scattered across leaf | Overfertilizing | Stop fertilizing for one month; flush soil with water |
| Brown tips with white crusty buildup on soil | Mineral-heavy tap water | Switch to filtered, distilled, or rainwater for 3–4 waterings |
How to Tell Them Apart and Fix Each
Feel the leaf. If it’s papery and dry and the browning starts at the tips and spreads down the edges, you likely have a humidity problem. Most homes sit at 30–40% humidity, which is tolerable but too low for your Monstera to thrive. Fill a tray with pebbles and water, and place your pot on top, or use a small cool-mist humidifier nearby to reach 50–60% humidity. Skip misting—it only creates a brief moisture spike and can encourage fungal issues.
If the brown spots are dark and come with a yellow halo, and the soil feels wet, overwatering is your culprit. Excess moisture causes root rot as fungal growth attacks the roots, spreading brown and black spots across leaves and stems. Stop watering immediately. Let the soil dry completely before the next watering. If roots feel soft and mushy, trim them with clean scissors and repot into a fresh chunky mix of potting soil, perlite, and orchid bark.
Light brown edges without a papery feel, combined with drooping leaves and soil that feels dry, point to underwatering. Water more often—check the top 2–3 inches of soil with your finger every few days. In summer, this usually means watering every 7–10 days; in winter, every 2–4 weeks. Use the soak-and-dry method: water thoroughly until saturated, then let it dry out before watering again.
If brown scorched patches appear on leaves exposed to direct light near a window, direct sunlight is burning them. Move your Monstera away from direct rays but keep it close to the window for bright indirect light. East or west windows 3–5 feet back, or south windows 4–6 feet back with sheer curtains, typically deliver the right amount of light.
Black and brown spots scattered all over the leaf surface mean you’ve overfertilized. Stop feeding for one month to let the plant recover. Going forward, fertilize with a balanced, water-soluble fertilizer every 2–4 weeks during spring and summer only.
Brown tips paired with a faint white crusty buildup on the soil surface suggest mineral buildup from fluoride, chlorine, or dissolved salts in tap water. Switch to filtered, distilled, or rainwater for three to four waterings and the tips should stop browning.
Prevent It Happening Again
Check soil moisture before you water— insert your finger to the second knuckle, and water only if it feels dry at that depth. Use a chunky, well-draining mix of 40% potting soil, 30% orchid bark, 20% perlite, and 10% compost. Keep humidity above 50% with a humidifier or pebble tray. Provide 6–8 hours of bright indirect light daily. Place the pot in a warm spot away from cold drafts and direct sun. Most browning problems disappear once you dial in the watering frequency and humidity level for your home.
Read the full guide: Monstera Care: The Complete Guide