trimming evergree trees
The trees look like leyland cypress. Pruning the lower branches will affect the natural shape of the tree and this tree seldom needs pruning except to remove dead wood. It is up to you if you want to prune. Do not prune August through October if you are pruning branches and not back to the trunk.
We recommend mulching out to the dripline of the tree to prevent string trimmer and lawn mower damage. Make sure mulch is no thicker than several inches and keep the mulch away from the base of the trunk.