how much can I prune back on an evergreen..?
I have two tall evergreens that I would like to prune back a bit severely as they have gotten too tall & too big around (like an arborvitae) for me to keep in shape. I topped the tree top main trunk & am leaving the new growth grow up in its place that I can keep in shape with pruners/hedge clippers... but how far back can I clip the side growth without killing it... not all the way back of the green growth & leave some of the green growth? Should I be conservative at first & each year go back a bit more into the green growth? I should have been keeping it in chec earlier!