Fig trees are subtropical trees, but they can grow successfully in cold climate if protected in winter. There are several methods to protecting the fig tree, Some growers bury the tree, some wrap it with different materials. If the tree is only a year or two old, it’s safer to bend the tree to the ground and cover it with mulch or other material, however as the tree matures it’s harder to bend down.This is a method that has worked for me successfully.