Are there any visible small insects on your houseplant?
Do you water your houseplant often?
Is your houseplant positioned in a bright spot with a lot of direct sunlight?
Several sap-sucking insects can cause leaves to curl. Pests like aphids, whiteflies, and thrips can distort leaves and cause leaf curling. If you spot any of them, spray them with insecticidal soap. Use repeated applications until they are gone. If there is a severe infestation, you can cut off those areas of the plant.
When your potting soil stays soggy for too long it can cause curled leaves, as well as lead to root rot. To avoid curling leaves due to soil that is too soggy, always allow the top inch of the soil to dry out. Always use pots with drainage holes. Allow water to completely drain away after watering and never allow your potted plant to sit in water for extended periods.
Too much light can cause leaves to bend and curl. Especially when older leaves are curling at the very tips of the leaves. To fix curling leaves from too much light, move your houseplant to a location that receives more appropriate light for the type of plant that you have. Also, get to know what acceptable light requirements are for your specific plant.
When leaves turn yellow and curl under, the plant may be suffering from too much heat. Never place plants near radiators or heat registers. When strong, southern sunlight falls directly on a windowpane, the glass radiates quite a bit of heat. If you take a vacation in the heat of summer, remember your plants, and don't turn the air conditioner off.
https://www.gardeningknowhow.com/houseplants/hpgen/curled-houseplant-leaves.htm
https://homeguides.sfgate.com/leaf-curling-houseplants-63974.html
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Sreten null
Hi! I’m Sreten Filipović. I graduated from the Faculty of Agriculture at the University of Belgrade, with a master's degree in Environmental Protection in Agricultural Systems. I’ve worked as a researcher at Finland's Natural Resources Institute (LUKE) on a project aimed at adapting south-western Finland to drought episodes. I founded a consulting agency in the field of environment and agriculture to help farmers who want to implement the principles of sustainability on their farms. I’m also a founding member of the nonprofit organization Ecogenesis from Belgrade whose main goal is non-formal education on the environment and ecology. In my spare time, I like to write blog posts about sustainability, the environment, animal farming, horticulture, and plant protection. I’ve also published several science-fiction short stories.
You can find me on LinkedIn at https://www.linkedin.com/in/sreten-filipovi%C4%87-515aa5158/