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Tomato Plant Problem Identifier: Diagnose Leaf, Fruit & Pest Issues

Yellow leaves, black spots on the fruit, holes overnight? Pick what you see on your plant and get the most likely cause plus the fix, in plain words.

What are you seeing?

This covers the most common tomato problems, which account for the vast majority of cases. If your plant does not match anything here, send us a photo through the contact page and we will take a look.
Most tomato problems trace back to a short list of usual suspects: watering that swings between soaked and bone dry, common fungal diseases like early blight and septoria, a handful of well known pests, and weather the plant does not like. The identifier above walks the same diagnostic path an experienced grower would, and the Problems section of this site goes deeper on every single one of these conditions.