Want to grow the sweetest tomatoes around? Use baking soda near your plants in the garden.
Just sprinkle baking soda on the soil around your tomato plants. The baking soda absorbs into the soil and lowers the acidity levels. This will give you tomatoes that are sweet rather than the tart flavor that store bought tomatoes have.
You can also use baking soda with canned tomatoes when making sauce if you like. It will sweeten them without having to add extra sugar (and calories!)