Don’t be shy with container size, and choose a fabric pot over a plastic pot. When it comes to tomatoes, the bigger the pot, the better. Determinate varieties should be planted in 10-gallon containers at a minimum, while indeterminate varieties need, at the very least, 20-gallon containers to thrive.Click to see full answer. Herein, do tomatoes grow better in pots or in the ground?When it comes to tomato containers, bigger is better. The bigger your container, the more soil it will hold. The more soil you have, the better the soil holds water. Also, the more soil, the more available nutrients for your plants.Furthermore, what is the best soil for growing tomatoes in containers? Good potting mixes contain peat moss, compost, vermiculite, perlite, and sand. The best mix holds moisture but doesn’t stay soggy. Standard mixes. Designed to sustain the plant but has little fertilizer or extra nutrients added. Beside this, how big should a container be for tomatoes? Choose the Right Pot. Those seedlings may look small now, but a full-grown tomato plant needs a lot of space for a strong root system. For maximum production, the ideal pot size is 18-inch diameter for determinate tomatoes and 24-inch diameter for indeterminate tomatoes.How often should tomatoes be watered?Water newly planted tomatoes well to make sure soil is moist and ideal for growing. Early in the growing season, watering plants daily in the morning. As temperatures increase, you might need to water tomato plants twice a day. Garden tomatoes typically require 1-2 inches of water a week.