Page 122 - Tài liệu cây cảnh Bonsai4me Bonsai Basics

Chapter 17 Maintenance Pruning 3-

Pruning Deciduous and Coniferous

Bonsai

Scissor Trimming and Finger Pruning

Bonsai must be pruned throughout the growing season to keep them in
shape. Some species such as Acers have a number of growth spurts through the
year, after each which they require pruning back; other species such as Junipers
require almost continual maintenance pruning.
When growing bonsai, it is nearly always found that the top of the tree grows
faster than the bottom due to apical dominance. One method of deciding how
and when to carry out maintenance pruning is to allow new buds to extend a
certain number of internodes (leaves), before pruning them back, according to
their position on the tree.
Strong, vigorous growth near the top of the tree, and the outer edges of the

branches is only allowed to extend 3 to 4 internodes before being pruned back to
the first internode. Growth within the middle area of the tree is allowed to extend
slightly further before being pruned back to the second or third internode,
allowing the shoot to retain more strength. Growth on the inner and lower
branches is allowed to develop still further extension before pruning back to 3 or
4 internodes.