Three-dimensional variant of a wavy cord . The spiral must be guided along a preformed frame.
The wavy shape naturally curdles the flow of juice. This has two advantages:
The growth in the head is suppressed.
Vegetative growth and flower bud formation (fruiting) are evenly distributed along the frame branch.
Images
Advice
Recommended espalier shape. The spiral cord is both productive and graceful . To get a neat spiral tree, you have to guide the tree along a concrete wire that is spirally preformed.