The Q&A Archives: Lower Leaves Yellowing on Tomatoes

Question: Why are the leaves turning yellow on the bottom of the tomatoes?

Answer: Jan,

When lower leaves turn yellow it is usually a sign of temporary droughty soil conditions or of a lack of nitrogen. If nematodes are infesting the root system the plants may also exhibit such symptoms. Nematodes are primarily a problem in sandy soils. They are best managed by planting resistant varieties of tomatoes (those with an "N" after the variety name, such as Celebrity VFN).

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