Monstera Leaves Turning Yellow

Why monstera leaves turn yellow: overview

A single lower yellow leaf on a monstera is usually normal leaf cycling. Multiple yellow leaves, or yellowing that starts on new growth, signals a problem. Overwatering causes about half of all US houseplant problems and is the first thing to check.

Monsteras (Monstera deliciosa and related species) are tropical plants adapted to the jungle floor, where they receive bright indirect light filtered through a forest canopy. US home conditions that deviate most from this — too much water, too little light, cold drafts, or poor soil nutrition — are the seven main causes of yellowing leaves.

Before doing anything else, count the yellow leaves and note their position on the plant:

• 1 lower leaf: normal, no action needed
• 2–4 lower leaves: investigate soil moisture and light
• New leaves yellowing: nutrient deficiency or root problem
• Many leaves simultaneously: urgent — severe overwatering or root rot likely

Cause 1: Overwatering (most common)

Overwatered monsteras develop yellow, soft, mushy leaves — usually starting at the base of the plant and working upward. The soil smells slightly sour or musty and stays wet long after watering.

How to diagnose: push your finger 2 inches into the soil. If it’s wet or even moist after more than 10 days since watering, you’re overwatering.

Correct watering frequency:

• Summer: water when the top 2 inches of soil are dry (every 10–17 days typically)
• Winter: water when the top 3 inches are dry (every 3–5 weeks typically)
• Never water on a fixed weekly schedule — adjust for season and light conditions

Fix: Stop watering. Let the soil dry out completely over 2–3 weeks. If the yellowing continues after the soil dries, root rot may have set in — see the root rot section below.

Cause 2: Root rot

Root rot is the advanced stage of chronic overwatering. Roots become waterlogged, oxygen-deprived, and colonized by soil pathogens (Pythium, Phytophthora) that cause the roots to decompose.

Signs specifically indicating root rot:

• Yellowing accelerates even after reducing water
• Plant wobbles or leans (roots not anchoring it)
• Pulling the plant from the pot reveals brown-black mushy roots
• The potting mix smells strongly of rot or decay

How to treat root rot:

1. Remove the plant from its pot
2. Shake off all soil and rinse roots under room-temperature water
3. Cut all brown, soft, or mushy roots with sterile scissors
4. Allow the root system to air-dry for 2–3 hours
5. Dust cut root ends with sulfur powder or cinnamon (natural antifungals)
6. Repot in fresh, fast-draining mix (50% potting mix, 50% perlite)
7. Do not water for 2 weeks after repotting

If more than 50% of the root system is lost to rot, propagate healthy stem cuttings as a backup while you attempt to save the main plant.

For full repotting and care guidance, our monstera adansonii care guide covers soil mix and repotting timing that applies to M. deliciosa as well.

Cause 3: Low light

Low-light yellowing is slower and more subtle than overwatering yellowing. It typically starts on older (lower) leaves, which the plant withdraws nutrients from first when light is insufficient for full photosynthesis.

Signs of low-light yellowing: older leaves gradually pale from dark green to light green to yellow over several weeks; new leaves emerge smaller than normal; the plant produces no new leaves for months.

Light requirements for healthy monsteras:

• Ideal: bright indirect light, 2,000–5,000 foot-candles
• Minimum for survival: 200–500 foot-candles (low-medium indirect)
• Too low: below 150 foot-candles (deep interior rooms, north-facing windows)

Fix: move the monstera within 5–6 feet of an east or west window. South-facing windows work if the plant is screened by a sheer curtain to avoid direct sun. North-facing windows are too dark for healthy growth in most US climates.

Cause 4: Direct sun exposure

Opposite to low light, direct sun burns monstera leaves. The damage pattern is distinct: leaves start turning yellow in patches, then the yellow patches bleach to white or brown in the areas with most sun exposure.

Signs of sun damage: bleached yellow-white patches on leaves facing the window; crispy brown edges on the sun-facing side; damage most visible on leaves nearest the glass.

Fix: move the plant back from the window or add a sheer curtain to diffuse direct sun. Damaged leaves will not recover — remove them as they yellow completely.

Cause 5: Nutrient deficiency

Nutrients deplete from potting mix over 6–12 months. Unfed monsteras develop yellowing — but the pattern differs from watering problems.

Nitrogen deficiency: older (lower) leaves turn yellow uniformly. The whole leaf fades from green to yellow without the soft mushy texture of overwatering.

Iron deficiency: new leaves emerge yellow with green veins (interveinal chlorosis). This is less common but can occur in high-pH soils.

Fix: fertilize with a balanced liquid fertilizer (20-20-20) diluted to half strength, applied monthly from March through September. For iron deficiency, use a fertilizer formulated with chelated iron.

Do not fertilize in winter — monsteras slow growth and cannot use the nutrients, leading to fertilizer salt buildup.

Cause 6: Cold temperatures and drafts

Monsteras are tropical plants that prefer temperatures of 65–85°F. Cold exposure — from drafts near windows, air conditioning vents, or temperatures below 50°F — causes cell damage that appears as yellowing, often with water-soaked patches.

Signs of cold damage: yellowing in patches, especially near the plant’s side closest to a cold window or vent; damage typically appears on the most exposed leaves within 24–48 hours of cold exposure.

Fix: move the monstera away from cold windows (at least 12 inches from glass in winter) and away from air conditioning or heating vents. Temperatures below 50°F cause permanent damage; below 40°F can kill the plant.

In US climates with cold winters, monitor monstera placement near windows from November through March. Glass conducts cold and the temperature at the window surface can be 20–30°F colder than room temperature.

Cause 7: Underwatering

Underwatering is the least common cause of yellow leaves in monsteras — most US houseplant owners overwater rather than underwater. But severe drought does eventually cause yellowing.

Signs specifically from underwatering: leaves droop and feel limp before yellowing; leaf tips turn brown and crispy (not mushy); soil is bone dry through and through; the pot feels very light when lifted.

Fix: water thoroughly until water drains from the bottom of the pot. The plant usually recovers within 1–2 weeks.

Comparison: how to tell the causes apart

How to fix yellow monstera leaves: step by step

1. Count yellow leaves and note their position (lower vs. upper)
2. Check soil moisture with the finger test at 2 inches depth
3. Note the plant’s light location and look for cold or heat sources nearby
4. Check when you last fertilized
5. Apply the right fix from the table above
6. Remove yellow leaves at the base with sterile scissors
7. Monitor for new yellow leaves over the next 4–6 weeks

A recovering monstera shows its health through new leaves. Yellowing that stops and is followed by fresh green growth means the fix worked.

When to repot a monstera with yellow leaves

If root rot is confirmed, repot immediately regardless of season. Otherwise, the best repotting time for monsteras is spring (March–May), when growth accelerates.

Repot up only one pot size at a time — going from a 6-inch to a 10-inch pot leaves excess wet soil around the roots that promotes overwatering problems. Choose a pot one size larger (2 inches wider) with drainage holes.

For complete care details that prevent problems before they start, our monstera adansonii care guide and best plants for beginners guide both cover the fundamental care practices that keep monsteras healthy in US homes. To understand what healthy houseplant soil looks like, see our how to test soil pH guide — soil pH affects nutrient availability in containers just as in garden beds.