In the March 6 and March 13 columns were guidelines for choosing fruit trees for our USDA Hardiness zones 7 and 8. In today’s column are guidelines for training stone fruit trees.Pruning of fruit trees is done to train the tree to a specific growth system. The most popular stone fruits are peach, apricot, plum, nectarine and cherry.The primary reason for pruning stone fruit trees is to open the…