Plant care guide
Snake Plant Curling Leaves: Thirst, Root Rot, Thrips or Variety?
Updated
Why are my Snake plant leaves curling?
Snake plant leaves that curl or fold inward usually lack water: either the mix has been dry too long, or rotting roots in wet mix can no longer take water up. Thrips feeding on young leaves and cold damage are less common causes. Some cultivars, such as 'Twisted Sister', twist by nature.
What to do first
Check the mix deep in the pot and press the leaf bases. Dry mix and firm bases: water thoroughly. Wet mix or soft bases: stop watering and check the roots. Then look closely at the new leaves for pale streaks and tiny black specks left by thrips.
A snake plant leaf that curls, folds lengthwise or twists out of shape is worth checking, because healthy leaves stay firm and flat for years. The RHS sansevieria growing guide says individual leaves usually live for many years. It also advises choosing plants whose leaves are smooth, not wrinkled or puckered.
Most curling comes down to water reaching the leaf, or not. The question is whether the mix is too dry or the roots are too damaged to use it.
Is it the variety?
Rule this out first. Some snake plants are meant to twist. NC State Extension’s snake plant profile lists ‘Twisted Sister’ with a twisting leaf habit. The RHS also describes the species as having upright, twisting leaves.
A naturally twisted leaf is firm, glossy and the same shape from base to tip. A stressed leaf feels thinner, softer or creased, and the change often shows on several leaves at once.
Sort the cause
| What you find | Likely cause |
|---|---|
| Mix dry deep in the pot, pot feels light, leaves thin and folding, bases firm | Underwatering |
| Mix wet, bases soft or yellow, leaves loose, sour smell | Root rot |
| New leaves crinkled or curled, pale silvery streaks, tiny black specks | Thrips |
| Collapsed or discoloured patches after a cold window or draught | Cold injury |
| Firm, glossy leaves with an even twist | Normal for the cultivar |
Underwatering. Virginia Cooperative Extension’s watering guide lists leaves that curl upward or downward among underwatering symptoms. It also lists dry potting mix shrinking from the pot edge and a very light pot. Clemson Extension’s disorders factsheet says chronic underwatering leads to wilting, leaf curling and death.
Root rot. This is the trap. NC State warns that the roots rot if the plant is overwatered. Rotted roots cannot supply water, so the leaves can fold and wrinkle in wet mix too. Virginia Cooperative Extension notes that overwatered and underwatered plants can look alike.
Thrips. NC State lists banded greenhouse thrips as a snake plant pest. Its banded greenhouse thrips factsheet says the larvae gather on leaf undersides and do most of the damage. University of Maryland Extension’s thrips page says young leaves fed on while still expanding can stay stunted, crinkled or curled. Look for pale stippling and small, dark, tar-like frass spots.
Cold. The RHS gives 15–24 °C (60–75 °F) as the ideal range and says to keep plants out of cold draughts.
What to do
- Lift the pot and push a finger deep into the mix. Check below the surface, not just the top.
- Press the base of a curled leaf. Firm is good. Soft, yellow or translucent points to rot.
- If the mix is dry and the bases are firm, water slowly until it drains from the bottom. Virginia Cooperative Extension suggests bottom watering to rehydrate dry mix fully. Empty the saucer afterwards.
- If the mix is wet or the bases are soft, stop watering. Slide the plant out and follow our snake plant root rot guide.
- If you see stippling or specks, isolate the plant. Rinse or wipe both leaf surfaces and treat as described in our houseplant pest guide.
- If it sat by cold glass, move it into the room, away from draughts and radiators.
A curled leaf may not flatten again, even once the cause is fixed. Judge the plant by firm, flat new leaves. The RHS suggests cutting off damaged leaves at the base, wearing gloves because the sap irritates skin.
Prevent it
Water only when the mix has dried out. The RHS suggests checking with a finger rather than watering by routine. NC State suggests watering only every one to two months in winter. Use a pot with drainage holes, and pour away water that collects in the saucer.
Thin, creased leaves without curling are covered in our wrinkled leaves guide. Leaves that flop or lean are covered in our drooping guide. For general care, see our snake plant care guide.
References
- NC State Extension Gardener Plant Toolbox: Dracaena trifasciata
- RHS: How to grow sansevierias
- Virginia Cooperative Extension: Properly Watering Container Houseplants (SPES-804)
- Clemson Cooperative Extension, HGIC 2251: Houseplant Diseases & Disorders
- University of Maryland Extension: Thrips in Home Gardens
- NC State Extension: Banded Greenhouse Thrips
How this guide was put together: Virginia Cooperative Extension, Clemson Extension, NC State Extension, RHS and University of Maryland Extension guidance.