Getting the timing wrong is one of the most common mistakes everyone makes when growing fruit trees. So, when is the best time to prune your fruit trees? Ask most experts, and they will tell you that late winter to early spring is usually the best time to prune your fruit trees. If you miss this window, you can also prune your fruit trees during summer, however, this is usually done for fast-growing fruit trees to help create a balance between tree growth and fruit production. Depending on the species, there might be exceptions, and there is no one-size-fits-all pruning calendar for fruit trees.