Most of the box turtles in the US actually have overlapping territories and they interbreed in the wild. You can look up the different species. Most of them are actually subs of the same species. I keep different subs together. I have Ornates, three toed and coastals. I would probably make a new garden if I had some deserts or easterns just because I would want eastern and desert babies and not mixed subs. You will get many people that will tell you to keep them seperate but that is for purity of the sub species. Their care is very similar and it is easy to make a garden or habitat that contains everything that all the sub species need. For instance, our garden has wild grown veggies in the back and a large grass area in front and there are 5 or 6 oil pans filled with water located all over the garden. There are also low spots that fill with water when it rains or when we flood them and a "house" they get locked in in the winter. The diversity of the area provides a good habitat for all the species and subs we will ever get. In Fargo you will have a lot less of an oportunity to make an outdoor garden but since box turtles actually do well in lower temps, as long as it is aroun 60 at night and gets up around 70 - 75 in the day, you should be able to have an outdoor area for them. That is something you don't need to worry about for four or five years if you get babies.Different kinds of boxies can live and breed together right? Or is that bad?