Pacific Northwest Gardening: PNW Work Party, 1 by LynnPhillips

LynnPhillips wrote:
Laurie1 and Thistle, Now you have me thinking. Here are pictures of part of my Sambucus hedge, I didn't get any pix when they were at their best in bloom. Darn.
Anyway, would you plant roses in between all of them? Color? Floribunda, Climber? Grandiflora? We have approx 25 or so of the Sambucus planted here, 3 years ago.
If I alternated roses and an evergreen clematis, would that be too busy? WOuld the clematis take over and strangle my Sambucus?