Are Your Tomato Leaves Curling? 7 Causes and How to Fix It Fast

Twisted or curled leaves on tomato plants can be caused by environmental stress, chemical exposure, or biological factors. While curling leaves do not necessarily kill the plant, determining the cause, or combination of reasons, as early as possible is crucial.

First, take a close look at the tomato plants and observe the plants over a few days to see if there is any progression:

• How many leaves are curling, just a few or all the leaves on the plant?
• Are the curling leaves mainly old leaves, new growth, or both?
• In what direction do the leaves curl, upwards or downwards?
• Are other parts of the plant, including fruit, showing any symptoms? 

Here are seven reasons why your tomato plants are having trouble with curling leaves and what you can do to fix it.

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