Coffee Plant Leaves Curling. The curling of plant leaves cannot be ignored, as it may be the start of a leaf curl. You won’t be able to treat your plant adequately if you don’t identify the root cause of the problem.
In short, to deal with calathea curling leaves keep these things in mind. Here again, the leaf curl is your plant’s effort to protect itself from the heat by reducing vulnerable surface area. Treat the plant with an insecticidal soap spray, keep the soil moist, and feed it with an organic potassium fertilizer like coffee grounds.
