What is the secret to planter tomato growing

large pot, patio variety plant, even watering and even fertilizer. Also go to your local county extension service and they will have a lot of advise for your local area.

Lots of WATERING! First lay your plants sideways in the soil. Remove the "suckers" (little sprouts and leaves) along the stem. As the plants grow, they will stand up. Use fertilizer. Put netting over your pots if u have critters. Otherwise, rabbits, squirels, etc. will eat 24/7.

use a large enough container, support the plant, water frequently, feed once per month

Easy. Just use only one plant in a container. Use at least a 5 gallon container. That way your tomato plants will grow large. Stake the plants as the tomatoes grow. Forgot! Be sure that you put holes in the bottom of your container. That allows you to have water drain and not become stagnant and mold. I put thin netting in the bottom of my container before the soil. Prevents roots from coming thru the pot holes. Be sure to put netting on top of your plant. Otherwise squirrels and rabbits will eat your plants.