How much baking soda is added to make tomatoes sweet? Added to soil ?

Just sprinkle a small amount baking soda (less than 1/4 cup per plant) on the soil around your tomato plants being careful not to get the soda on the plant itself. (You can also use 1 tsp in a gallon of water and water the plants that way!)

I have never heard of doing this, and I don't think it will have any effect on the taste of the tomatoes.

im not sure if it will sweeten your tomatoes, but it may give a ph balance to your soil.

You should get a PH test. Baking soda will change the PH, and maybe not in a way that will help your plant.

heard that you put a tablespoon of sugar in each hole when you plant.

Epson salt is very good for tomatoes.