Short answer
Monstera deliciosa leaves curl primarily due to underwatering or low humidity, which causes the plant to roll its foliage to conserve moisture. The most common fix is to establish a consistent watering schedule that ensures the soil dries out slightly but never becomes completely parched.
When a Monstera deliciosa experiences curling leaves, it is usually a sign of environmental stress rather than a disease. While mature leaves should remain flat and deep green, mild curling is a common early-warning system that the plant's internal water pressure is dropping, and it is usually easily reversible if caught early.
Monstera leaves will roll inward when the plant is not receiving enough water to maintain turgor pressure in its large foliage. This is often exacerbated by potting mixes that have become too hydrophobic or by failing to water until the entire pot is bone-dry.
Check: Check if the potting soil has pulled away from the sides of the pot or if the container feels significantly lighter than usual when picked up.
Fix: Deeply soak the soil until water runs through the drainage holes, ensuring the root ball is fully saturated, then return to a schedule of watering once the top two inches are dry.
Monstera deliciosa thrive in tropical environments and will curl their leaves as a defense mechanism to reduce the surface area exposed to dry, arid indoor air. If your household humidity is consistently below 40%, the leaves will struggle to remain flat.
Check: Inspect the leaf edges for signs of browning or crispiness, which often accompany curling in low-humidity environments.
Fix: Increase ambient humidity by using a humidifier near the plant or grouping it with other tropical species to create a localized microclimate.
If the roots are damaged by severe overwatering, root rot, or physical disturbance, they lose the ability to transport water to the leaves. Even if the soil feels damp, the plant effectively experiences drought because the root system cannot function.
Check: Gently check the root ball; if the roots appear mushy, brown, or have a foul odor, root rot is likely present.
Fix: Trim away any decaying roots, repot the plant in fresh, well-draining aroid mix, and allow the soil to dry out more thoroughly between waterings.
When to worry
You should take urgent action if the curling is accompanied by widespread yellowing, soft stem tissue, or if the leaves remain curled even after the soil has been thoroughly moistened.
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Diagnose my MonsteraIf the curling is minor and caused by temporary underwatering, the leaf will likely flatten once hydration is restored. However, if the leaf has been curled for an extended period, it may remain permanently deformed.
Yes, excessive direct sunlight can cause leaf curling as a stress response to prevent scorching. If the leaves look bleached or pale alongside the curling, move the plant slightly further away from the window.
Misting provides only very short-term relief and does not significantly raise the humidity level around the plant. A humidifier or a pebble tray is a much more effective long-term solution.
Consistent with guidance from: Royal Horticultural Society, University of Florida IFAS Extension.