So I've learned a huge lesson. Without knowing any better, and assuming cheery tomatoe plants were small, I planted 2 of them in one 18-20" pot. Now that they are starting to bear fruit, they have gotten huge, over 5 feet tall. I originally supported them with one bamboo shoot and tried to train them away from one another. They really sprawled out though, down to the ground. I got home yesterday and the 2 main stems that were growing sideways and down towards the ground had broke and were hanging down (had a rain/wind storm). I cut them off and tried to plant them(we'll see). Anyways, my question is: should I remove one of the plants now to save the second? It is quite obvious that one plant in the pot would have been the way to go? If I dont remove one, I've thought about adding some more support for the plants, but now that they are so grown up, can I add a cage or something the like at this point? Seems it would be hard to do, to train the branches into the cage when they already have a mind of their own? Any advice would be appreciated.

Thank you.