Although many people believe winter is the "correct" time to trim trees, that's not a hard and fast rule. It's often possible to trim trees year-round, although certain trees may benefit from trimming during periods of growth or dormancy. Still, while tree trimming is an important service during every season, winter is a particularly good time to schedule an annual trimming.  If you don't normally trim your trees or you're wondering about the best time to schedule your next trimming appointment, check out these three reasons why winter can be a wonderful time to cut back your home's trees.