2013 Flush - Older Own Root acquired in 2009
Embarrassing to show hideous garden - but thought this photo may be a good comparison that America climber seems happiest and most abundant in blooms as a pegged rose? Because tons of rabbits killing young canes, fencing is always required in my locale if one grows non-knockouts. Whenever I have the chance I try to peg or force the roses to drape to help camouflage the ugly mesh. I use thin vinyl coated wire to "thread the canes laterally in increments.
Andrea Stelzer, a vigorous hybrid tea, budded on Fortuniana, growing happily in an area of poor soil and heavy root competition. Photo taken in Dana Point, CA , zone 10B, in late April, 2016.