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Curling leaves are one of the most common signals houseplants send when something's not quite right. The tricky part is that curling can mean several different things. The good news: once you know what to look for, the cause is usually easy to spot, and even easier to fix.
The most common culprit. When a plant doesn't get enough water, its leaves curl to reduce the surface area losing moisture. You'll usually see leaves curling upwards or inwards, feeling dry or crispy at the edges, and soil pulling away from the sides of the pot.
The fix: Give your plant a thorough drink until water runs from the drainage holes, then let it drain fully. Going forward, check the soil regularly and water when the top few centimetres feel dry.
Curling isn't only about thirst. Overwatered plants often curl their leaves downwards, and you might also notice yellowing, drooping, or soil that stays soggy for days. Left too long, constantly wet soil can lead to root rot.
The fix: Let the soil dry out before watering again, and make sure your pot has drainage. If you suspect root rot, trim away any brown, mushy roots and repot into fresh soil.
Tropical houseplants love humidity. When the air is too dry (hello, heating in winter and air conditioning in summer), leaf edges can curl and turn crispy.
The fix: Group plants together, move them to a naturally humid room like the bathroom, or use a humidifier to keep the air around them comfortable.
Leaves that curl plus show bleached or scorched patches are often telling you they're getting more direct sun or heat than they can handle.
The fix: Move the plant a little further back from the window, or soften harsh light with a sheer curtain.
If it's mainly the new growth that's distorted or curling, it's time to play detective. Pests like aphids, thrips, and spider mites feed on tender new leaves, causing them to curl as they develop. Check the undersides of leaves for tiny insects, fine webbing, or sticky residue.
The fix: Isolate the affected plant so pests don't spread, wipe the leaves down, and treat with a plant-safe pest spray. A neem oil-based spray like our Protect Organic Plant Spray is a good option to have on hand.
Sudden cold draughts or blasts of hot air from heaters and vents can stress plants enough to curl their leaves.
The fix: Keep plants away from draughty doors and windows and out of the direct line of heaters and air conditioners.
Most curling comes down to water and environment. A consistent watering routine, stable temperatures, and a quick weekly check of the leaves will catch most problems before they get serious.
With a little detective work, curling leaves are usually fixable, and your plant will be back to flat, happy leaves in no time.
1. Underwatering Can Cause Plant Leaves to Curl
The most common culprit. When a plant doesn't get enough water, its leaves curl to reduce the surface area losing moisture. You'll usually see leaves curling upwards or inwards, feeling dry or crispy at the edges, and soil pulling away from the sides of the pot.
The fix: Give your plant a thorough drink until water runs from the drainage holes, then let it drain fully. Going forward, check the soil regularly and water when the top few centimetres feel dry.
2. Overwatering Can Also Cause Curling
Curling isn't only about thirst. Overwatered plants often curl their leaves downwards, and you might also notice yellowing, drooping, or soil that stays soggy for days. Left too long, constantly wet soil can lead to root rot.
The fix: Let the soil dry out before watering again, and make sure your pot has drainage. If you suspect root rot, trim away any brown, mushy roots and repot into fresh soil.
3. Low humidity can cause curling
Tropical houseplants love humidity. When the air is too dry (hello, heating in winter and air conditioning in summer), leaf edges can curl and turn crispy.
The fix: Group plants together, move them to a naturally humid room like the bathroom, or use a humidifier to keep the air around them comfortable.
4. Too much light or heat are a big cause
Leaves that curl plus show bleached or scorched patches are often telling you they're getting more direct sun or heat than they can handle.
The fix: Move the plant a little further back from the window, or soften harsh light with a sheer curtain.
5. Pests Can Cause Leaves to Change
If it's mainly the new growth that's distorted or curling, it's time to play detective. Pests like aphids, thrips, and spider mites feed on tender new leaves, causing them to curl as they develop. Check the undersides of leaves for tiny insects, fine webbing, or sticky residue.
The fix: Isolate the affected plant so pests don't spread, wipe the leaves down, and treat with a plant-safe pest spray. A neem oil-based spray like our Protect Organic Plant Spray is a good option to have on hand.
6. Temperature stress = Plant Leaves Curling
Sudden cold draughts or blasts of hot air from heaters and vents can stress plants enough to curl their leaves.
The fix: Keep plants away from draughty doors and windows and out of the direct line of heaters and air conditioners.
How to work out the cause
- Check the soil: bone dry points to underwatering; constantly soggy points to overwatering.
- Look at the pattern: crispy edges suggest water or humidity issues; distorted new growth suggests pests.
- Inspect the leaves (especially the undersides) for pests.
- Think about recent changes: a new position, a seasonal shift, or the heating coming on.
How to Prevent Houseplant Leaves Curling
Most curling comes down to water and environment. A consistent watering routine, stable temperatures, and a quick weekly check of the leaves will catch most problems before they get serious.
With a little detective work, curling leaves are usually fixable, and your plant will be back to flat, happy leaves in no time.