We have been planting tomatoes for years in containers and they have done great. We buy the big square containers (we find they don't tip as easy as the round ones that tend to get a little top heavy). I fill the containers up with Miracle Grow potting soil (this year I used the one that has moisture crystals added to it). I also added just about a half teaspoon of Osmocote fertilizer to each container. I then put in two plants per container as well as one or two spices (basil, oregano, rosemary all work well). I use a square tomatoe case and stake each plant up. We find we have far less critters, mold and damage to the plants and the tomatoes taste just as good as the ones in the ground. Last year we tried what they call patio tomatoes and I didn't care for their taste. This year we went back to Big Boys, Early Girls, Rugers, Brandywine, Better Boy, we also do grape and roma tomatoes. Hope this helps, good luck.