Hey, I am new to the business and I have started out as a general lawn maintenance company. Today I helped a friends dad prune a bunch of trees and he basically just wanted to cut all the branches off up to 10 FT for mowing and light/water reasons. Is this the proper thing to do? Is there a proper way to prune/time of the year? I know very very little about trees so any advice/literature would be great. Thanks Jeff P.S Im in Southern Ontario.