Pothos Leaves Curling: Thirst, Heat, Roots or Pests?

Curled pothos leaves are a signal, not a diagnosis. The most common reason is thirst, but a pothos in wet mix with damaged roots can curl too. So can one sitting over a heater or crawling with thrips. Do a few quick checks before you water, mist or spray.

Check 1: Is the Root Ball Dry?

Virginia Cooperative Extension lists leaves curling upward or downward among the signs of an underwatered houseplant (VCE: Properly Watering Container Houseplants). Other signs on its list:

• Wilting
• Dry or brittle leaves, with brown tips or edges
• Potting mix shrunk away from the side of the pot
• A pot that feels very light

VCE suggests pushing a finger 2.5–7.5 cm (1–3 in) into the mix, depending on pot size, to check moisture below the surface.

Fix: Water thoroughly so water reaches all the roots, as Clemson HGIC advises for pothos (HGIC 1568). Let the excess drain away. After that, let the mix dry between waterings, not bone dry for weeks.

Check 2: Is the Mix Wet but the Leaves Still Limp?

VCE’s overwatering list includes wilting, yellowing on new and old leaves, soft stems, leaves dropping and a rotten-smelling mix. A curled, limp leaf above wet mix may mean the roots have stopped taking up water.

Fix: Do not add water. Slide the plant out and look at the roots. Firm, light roots are healthy; dark, mushy roots are rotting. Our pothos root rot guide covers what to cut and how to repot.

Check 3: Heat, Cold or Strong Light?

Clemson HGIC advises keeping pothos away from air-conditioning vents in summer, and from windowsills and heating vents in winter. Hot and cold air can dry out leaves and damage plant cells. Clemson gives a preferred range of 16–21 °C (60–70 °F) at night and 21–29 °C (70–85 °F) by day.

Iowa State Extension advises avoiding drafts from doors, heat vents and windows. It also warns against trapping plants between the window and a curtain, where temperatures swing between day and night (Iowa State: Diagnosing Houseplant Problems).

Curling with pale, bleached or crisp patches on the most exposed leaves points to light or heat. Clemson links leaf scorch to intense light or low humidity. See our pothos sunburn guide.

Fix: Move the plant to bright, indirect light away from vents and hot glass. Iowa State advises changing light levels gradually.

Check 4: Are Pests Distorting New Leaves?

University of Maryland Extension notes that young leaves fed on by thrips while still expanding can stay stunted, crinkled or curled (UMD: Thrips in Home Gardens). Look for silvery streaks and dark specks. Spider mites leave fine stippling and webbing. Mealybugs leave white, cottony tufts in the leaf joints.

Fix: Turn over several leaves and check the stems. Treat only once you have identified a pest. Our guides cover thrips, spider mites and mealybugs.

What About Humidity?

Clemson says pothos prefers 50 to 70 percent relative humidity, compared with 30 to 60 percent in an average home, and tolerates the lower levels. Rule out the root zone, position and pests first, then add humidity if the air is very dry. NC State Extension suggests a humidifier or a tray of wet pebbles to raise humidity (NC State: Epipremnum aureum).

After the Fix

Leaves that curled badly may stay marked. Judge recovery by the next new leaves. If they open flat and keep their colour, the cause is under control. If new growth still curls, run through the checks again. If the stem base turns soft or dark, see the pothos black stems guide. For general care, see the pothos hub.

References

• Virginia Cooperative Extension: Properly Watering Container Houseplants
• Clemson HGIC 1568: How to Grow Pothos Indoors
• Iowa State University Extension: Diagnosing Houseplant Problems — Improper Environmental Conditions
• University of Maryland Extension: Thrips in Home Gardens
• NC State Extension Plant Toolbox: Epipremnum aureum