Pothos Leaves Curling

Why pothos leaves curl

Pothos is one of the most adaptable houseplants, but curling leaves are its way of signaling something is off with its water balance. The curling is a physical response: when leaf cells lose turgor pressure (the water pressure that keeps leaves stiff and flat), the leaf curls toward itself to minimize the surface area exposed to air, reducing further water loss. The most common trigger is underwatering, but anything that disrupts water uptake or causes rapid water loss can produce the same result.

Cause 1: Underwatering (most common)

Signs: Leaves curl inward, feel slightly soft or papery rather than firm and glossy. The soil is very dry when you press your finger into it, and the pot feels light when lifted. The plant may also look generally dull rather than vibrant.

Why it happens: Pothos soil should dry out between waterings, but if the plant goes too long without water the leaves begin to curl as the plant conserves moisture. Despite its reputation for tolerating neglect, pothos will eventually show drought stress, especially in warm or brightly lit conditions where it uses water quickly.

Fix: Water thoroughly until water drains from the pot's drainage holes. Set the pot in a tray of water for 20 to 30 minutes if the soil has become so dry it is repelling water rather than absorbing it. Most curling leaves will return to flat within a few hours of watering. Going forward, water when the top 2 inches of soil are dry.

Cause 2: Root rot from overwatering

Signs: Leaves are curling even though the soil is moist or wet. You may also see yellowing, browning, or a general decline in the plant. The pot may smell musty. When you unpot the plant, the roots are brown or black rather than white, and may feel soft or fall apart.

Why it happens: Rotted roots cannot absorb water. The plant is sitting in wet soil but dying of thirst because its root system has been destroyed by anaerobic conditions. The curling looks identical to underwatering drought stress because the mechanism is the same: insufficient water reaching the leaves.

Fix: Remove the plant from the pot. Trim all dark, soft, or mushy roots with clean scissors until only firm, healthy white or tan roots remain. Let the roots air dry for a few hours, then repot in fresh, well-draining potting mix. Allow the top inch or two of soil to dry before the next watering.

Cause 3: Root-bound pot

Signs: Leaves curl despite regular watering, and the soil dries out unusually fast. Roots are visibly circling the bottom of the pot or growing out of drainage holes. The plant has been in the same pot for a year or more without repotting.

Why it happens: When roots fill the entire pot, water passes through quickly without being absorbed, and densely packed roots cannot draw in moisture efficiently. The plant experiences water stress even when watering is consistent.

Fix: Repot into a container 1 to 2 inches wider in diameter with fresh potting mix. Gently loosen circling roots before planting so they grow outward rather than continuing to spiral.

Cause 4: Temperature stress

Signs: Leaves curl or droop, especially downward rather than inward. The plant is near a heating or cooling vent, a cold drafty window, or has been exposed to temperatures below 50°F. Curling may be localized to the side of the plant nearest the cold or heat source.

Why it happens: Cold causes cell damage and impairs water uptake. Hot, dry air from vents causes rapid water loss from the leaves faster than the roots can replace it. Both produce curling.

Fix: Move the plant at least 2 feet from heating or cooling vents. Keep pothos in temperatures between 60 and 85°F. Protect from windows that get very cold in winter.

Cause 5: Low humidity

Signs: Leaf edges curl upward or inward, especially on new growth. The plant may also develop crispy brown leaf tips. The home is particularly dry (common in winter with central heating).

Why it happens: Very low humidity causes the leaf surface to lose moisture faster than the plant can replace it. Pothos is more tolerant of low humidity than many houseplants, but consistently very dry air (below 30% relative humidity) can cause curling, especially for newer, tender growth.

Fix: Move the plant to a slightly more humid location, such as a kitchen or bathroom. A pebble tray with water placed under the pot raises local humidity slightly. A humidifier near your plant collection is the most effective solution. Misting is helpful temporarily but dries too quickly to make a meaningful difference.

Cause 6: Pest damage

Signs: Curling is accompanied by tiny brown or yellow stippling on the leaf surface, fine webbing on the undersides of leaves, or visible tiny insects. The curling is uneven, often affecting individual leaves rather than the whole plant.

Why it happens: Spider mites are the most common culprit. They pierce leaf cells to feed, disrupting water movement through the leaf. The leaf curls as a response to cell damage. Thrips can cause similar symptoms.

Fix: Inspect the undersides of leaves with a magnifying glass. Wipe leaves with a damp cloth to remove mites, then treat with insecticidal soap or neem oil, coating both leaf surfaces thoroughly. Repeat every week for 3 to 4 weeks to break the pest cycle.

Frequently asked questions

Why are my pothos leaves curling inward?

Pothos leaves curling inward is almost always a sign of water stress. The most common cause is underwatering: when soil dries out completely, the plant loses turgor pressure in its leaves and they curl toward the center to reduce water loss through the leaf surface. Less commonly, inward curling can also result from the plant being root-bound (circling roots can no longer absorb water efficiently even when soil is moist), from low humidity causing rapid leaf moisture loss, or from cold drafts. Check the soil moisture first: if the soil is very dry and the leaves feel slightly limp or papery, water thoroughly and the curling should resolve within a few hours.

Can overwatering cause pothos leaves to curl?

Yes, but it is less common than underwatering curl. Overwatering causes root rot, and rotted roots cannot absorb water even when the soil is wet. The plant then shows the same drought-stress curling even though the pot is saturated. The difference: with underwatering, the soil is dry and the pot feels light. With overwatering damage, the soil is wet or the roots are dark and soft when you unpot the plant. If your pothos soil is already moist when the leaves are curling, suspect root damage rather than drought.

How do I know if my pothos is underwatered or overwatered?

Stick your finger 2 inches into the soil. If the soil is completely dry and the pot feels light when lifted, the plant is underwatered: water thoroughly until water drains from the bottom. If the soil is wet or damp and has been that way for an extended period, and if you see yellowing alongside the curling, suspect overwatering or root rot. Unpot the plant and check the roots: healthy roots are white or tan; rotted roots are brown, black, or mushy. Trim all rotted roots, allow the plant to dry slightly, and repot in fresh well-draining mix.