What's up? I'm not looking for a price, rather advice. I have to price a trim job on a row of arbs, the thing is they are 17' - 22+' tall. What is the most I can trim off them at one time? Is it possible to to almost cut them in half, and put the "tree sealant" on them to heal and protect them? I live in NY, so it is still chill in there every other day. can I do it this season, or wait until late fall/winter?