Great suggestions here. I followed this advice last year and had many more bloom shoots on my climbers this year than the year before I began the horizontal training.
Thank you.
I'm training a few of mine to go overhead, so I let them grow about 6 feet tall and then clip off the main vertical stems to encourage elongation of side shoots. The walk-through arbor is very nearly covered with roses and clematis now.
Will I at some point need to cut back these main verticals at ground level and start new ones?