noun
cutting back; pruning
Gardening term for trimming plants to control growth or shape.
バラの切り戻しは冬に行います。
Pruning of roses is done in winter.
切り戻しをすると、新しい芽が出やすくなります。
Cutting back encourages new shoots to grow.
剪定 is a broader term for pruning trees and shrubs, while 切り戻し specifically refers to cutting back overgrown stems or branches.
Compound of 切り (stem of 切る, 'to cut') and 戻し (stem of 戻す, 'to return, put back'), literally 'cutting back'.