Fig trees wont really do well planted outdoors in zone
5, in fact it will be winter killed in zone
5, Both of my parents are from Italy, so they always grew figs, but they were in zone
6 or 7. Even in zone
6 and seven they need winter protection. My dad used to trim them back in fall, and wrap the tree with wire mesh leaving space around the tree, and fill it in with leaves to insulate it during the winter months. But in zone
5 that may be a useless thing to do as your winters are too cold. Ive read that some people actually dig up a fig tree, and plant them sideways in the fall- cover them with dirt in trenches, then in spring
redig it up- seems like too much work. They can be grown in pots, just get one big enough to support the roots, and dont keep the soil too wet. You can keep it outside during the warm months, and bring it inside during the cold months. Figs are also easy to propagate as well!