From http://www.tomatodirt.com/tomato-fertilizer-kinds.html
Once a plant is established in the garden, a phosphate-concentrated application (such as 0-46-0 commercial fertilizer) every 6-8 weeks increases tomato production. Bone meal, with an analysis of 4-12-0, is a good organic source of phosphorus. When a tomato plant sets fruit, start a systematic fertilization program and feed every three weeks until frost.
