@CalamityJane,
I bet you can grow marvelous roses, Cal. what do you
have, really?
The lilac bushes needed only the removal of
a few dead stubs left from last year's trimming.
But I did cut back on overhead growth from the
flowering crab's lower limbs to allow them more
sunlight.
It's been years since these bushes bloomed, and they give white flowers; so I'm
leaving their flowering branches alone this year.
I cut them back really hard about five years ago - they were about ten feet tall
then- and kept them low until the violet ones, which were only rooted suckers, caught up.
I'll maintain all those lilacs, white and violet, as an even hedge at six feet in height.