The way to maintain this graceful appearance is by "renewal pruning."
With renewal pruning, work with the plant's natural growth habit.
Variations in the growth habits of deciduous shrubs dictate the degree of renewal pruning needed.
They include dwarfing rootstocks, high planting densities, renewal pruning, and growth regulators which result in high early yields, high sustained yields and excellent fruit quality.
Lespinasse (1977) studied the natural growth of different tree types and developed the concept of renewal pruning. He developed the Vertical Axis system to take advantage of the natural growth habit of the tree and to minimize the shading problem of permanent upper tier branches.
apical dominance auxin collar heading back renewal pruning
The three major types of pruning are thinning out, heading back, and renewal pruning. The main goals for training ornamental trees are to make the tree trunk strong, produce an attractive plant form, and establish a set height.
The three basic strategies for pruning are thinning out, heading back, and renewal pruning. Thinning out is the removal of excessive vegetative growth to open the plant canopy and reduce the number of fruiting branches with the goal of promoting larger and overall better-quality fruits.