Buy the seeds from trusted dealers. Note that some varieties of tomatoes (check your variety) are naturally striped, green, or otherwise not like an ordinary red tomato when mature. To illustrate this, terra cotta pots are porous. Free postage. Tips for Growing Heirloom Tomato Plants in Containers. Add a layer of pebbles or river rocks to the bottom of the pot, then fill the pot the 1/3 of the way with a mixture of potting soil and vegetable fertilizer. If you’re a beginner, start with cherry tomato, they’re easier than other varieties. Plant Specialist. There are 18 references cited in this article, which can be found at the bottom of the page. Then, remove it at the start of each day. If you see a dark, rotting spot on the bottom of your tomatoes, it could be blossom-end rot. To use a tomato cage, … After soaking it so thoroughly, your tomato plant may not need additional watering for an entire week. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/35\/Grow-Tomatoes-in-Pots-Step-01.jpg\/v4-460px-Grow-Tomatoes-in-Pots-Step-01.jpg","bigUrl":"\/images\/thumb\/3\/35\/Grow-Tomatoes-in-Pots-Step-01.jpg\/aid2204827-v4-728px-Grow-Tomatoes-in-Pots-Step-01.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"