Plant Alyssum under tomatoes to attract pollinators.
Plant in full sun and give them at least 1.5′ of space to grow.
Enhance soil with epsom salt to fertilize plants.
Water once weekly, for long soaks.
Surround with Marigolds as well to deter unwanted insects.
Pull suckers (the lower branches which boast no flowers) in order to guide the plant’s energy to making fruit, not growing leaves.
How to Grow World Record Tomatoes: A Guinness Champion Reveals His All-Organic Secrets: http://amzn.to/ZwkotF