Why are my tomato plant leaves turning yellow?

Hi Anna,

The answer may be in your question, "tons of water", try to water only the roots-with somewhat less water- and see if they respond better. Yellow leaves usually indicates too much water. You can also give them a nutrient called Epsom Salt, this is magnesium sulfate, something they need to stay healthy. Put it on the soil only because it can burn the plant. Best to you.

Tomato plants are annuals, not perennials, so they will die when they are finished producing. Leaves turning yellow can be the plant telling you it is spent.

Save some seeds from the tomatoes for next years plants.

If they are turning yellow from the bottom of the plant up, it is most likely a soil borne disease. Don't fret, just pull off the yellow leaves and dispose of them in the trash. Your plant will continue to grow and produce loads of fruit. Add a stake or tomato cage to tie your plant up away from the ground. Mulching your plants as soon as you plant them will help, but not eliminate, yellowing leaves. Removing excess leaves and suckers will force the plant to produce more fruit.

Give them a couple tablespoons of Epsom salts in a gallon of water and water them especially in the heat. The epsom salts help them green up and produce better.

they may need to be fertilized with nitrogen.

The most common reason why the leaves on established tomato plants turn yellow is a lack of nutrients in the soil. Tomatoes are extremely heavy feeders and require plenty of nutrients to grow healthy and be fruitful.

Maybe too much water?