Why Are My Plant Leaves Curling?
Curling leaves are one of those plant symptoms that can mean several different things, which is extremely helpful of them. A plant might curl its leaves because it is thirsty, overwatered, too hot, too cold, too dry, pest-stressed or just being a little dramatic. The trick is to look at the whole plant, not just one leaf. Browse our plant care tools if you are troubleshooting your indoor plants.
Underwatering is one of the most common causes of curling leaves. When a plant loses more moisture than it can take up, leaves may curl inward to reduce water loss. Check the soil with your finger or a soil moisture meter. If the mix is dry and pulling away from the pot, water thoroughly and let the excess drain.
Overwatering can also cause curling, which is why guessing is annoying. If the soil is wet, heavy or smelly, the roots may be struggling. Damaged roots cannot take up water properly, so the plant can look thirsty even while sitting in soggy soil. If yellow leaves are also appearing, read our guide on why plant leaves turn yellow.
Low humidity can make some indoor plants curl, especially tropical varieties like Calatheas, ferns and some aroids. Dry air from heaters, air conditioning and winter weather can cause curling, crispy edges or brown tips. If crispy edges are part of the problem, read our brown tips guide.
Heat and direct sun can also make leaves curl. Plants may curl or cup their leaves when light is too intense or the window is too hot. Move the plant into bright indirect light rather than harsh afternoon sun. If the room is dark and the plant is stretching or weakening, browse our grow lights for extra support.
Cold draughts can cause curling too. A plant sitting near a cold window, doorway or air conditioning vent may react quickly, especially in winter. Move it to a more stable position and avoid sudden temperature changes where possible.
Pests are another possibility. Check the undersides of leaves, new growth and stem joints for tiny bugs, webbing, sticky residue or speckling. Spider mites, thrips and other pests can distort leaves as they feed. Read our guide on common indoor plant pests if you see anything suspicious.
Some plants naturally curl or move their leaves throughout the day. Prayer plants and Calatheas can shift their leaves as light changes, which is normal. If you are caring for one, our Calathea care guide can help you tell normal movement from stress.
Repotting stress can also cause temporary curling. If you recently changed the pot, disturbed the roots or moved the plant, give it stable conditions and time. Do not fertilise immediately after repotting. If the potting mix is old or compacted, our guide on ideal potting soil may help.
To fix curling leaves, start with the soil, then check light, temperature, humidity and pests. The best solution depends on the cause. If you want more forgiving plants while you learn the signs, browse our beginner plants or indoor plants for easier options.