What it means and what to do May 6, 2026 - by Adam Russell Tomato plants are popular in home gardens, but problems can appear quickly and be hard to diagnose.

Leaves may curl, turn yellow, twist or become spotted, and fruit can become damaged.

While the symptoms may look alarming, most tomato problems stem from a few common causes: nutrition, environmental stress, pests, diseases or herbicide exposure, according to a Texas A&M AgriLife Extension Service expert.