When tomato leaves start curling inward, it's easy to fear a serious disease. However, if the plants remain green and otherwise healthy, the cause is likely physiological leaf roll—a temporary response to environmental stress.
No treatment is needed. The rolling typically resolves within a few days once the soil dries out. Yield and plant growth are unaffected. Simply ensure good drainage and avoid overwatering.
See also: Tomato Leaf Roll, Three Causes of Tomato Leaves Curling

Tomato leaf curl

Tomato leaf curl
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