Tall spindle plantings produce high early yields and are simple to train and prune. There are numerous ways to grow apple trees, and many of them can be successful, says Dr. Terence Robinson, research ­horticulturist with Cornell University, New York. “As I travel around the world, I see a number of successful modern systems,” he said. Robinson categorizes training systems as freeform (tall spindle, super spindle, and biaxis), semiorganized (Solaxe), and organized (V-trellis and vertical trellis). Freeform The tall spindle, which is the system Robinson favors, has trees planted 3 to 4 feet apart with 11 to 12 feet between […]