If you’re going to plant tomatoes in a container, there are several things that you need to know. One is that tomatoes need space. It’d be wise not to crowd them, and give them plenty of room to branch out. So as not to stunt their growth, plant each seedling in a four-inch pot.
Tomatoes also need lots of sunlight to thrive. Put the pot in an area in your garden that receives plenty of sunshine. If you’re going to use artificial lighting, that’s okay. Make sure you give it to your tomatoes for at least 14 hours a day.