32 oz Container of Farmer Wanda's "Magic Dust" Fertilizer for Tomatoes.  Just mix in 1/2 cup in the hole when transplanting & scratch in the surface around the stem at 6 weeks.  This natural and organic fertilizer has a 5-5-3 ratio and contains beneficial minerals and Mycorrhizal fungi. 
We also mix lime to boost calcium and other nutrient availability, maintain a proper soil pH and prevent common tomato diseases like blossom-end rot. 
We also add Magnesium.  This makes it easier for your tomatoes to obtain nutrients from the soil, strengthen cell walls, building stronger roots and healthy blooms.
1 container is sufficient for 4 plants.