Most trees and shrubs can be pruned any time of the year. This can be done annually. The fall and winter seasons are a good time as the trees and shrubs go dormant. It is also easier to prune when there are no leaves and you can see the shape of the plant.
Reasons for Pruning:
How to Prune Properly
Pruning should also be done correctly. There are different techniques used for different plants, trees and shrubs. Make sure your pruning shears are sharp and make all cuts clean and smooth.
First, remove broken and dead branches. Cut back small branches that form an angle of no more than 45 degrees. Make slanting cuts, removing limbs that grow upward. For thick, heavy branches of more than 1 ½" in diameter, use a three-part cut. This first step of this cut is to saw an undercut from the bottom. Make a second cut from the top, about 3" from the undercut and let the branch fall away. The last cut involves the resulting stub, which can be cut back to the collar of the branch. This technique makes a perfect cut every time. It will be smooth, clean, neat and flat.