Dave Smith wrote:

How quickly do they grow? Will it take years to go up that pole?

Roses or Clematis? The roses will grow quickly, especially in warner
zones. My taller roses seem to throw 6-7' canes every year. Clematis
take time to get established, and could take about 3 years to get to a
good size. That said, my neighbor's Jackmanii got well over 10' tall in
2 years. If you get well established plants from a reputable source
(like Chalk Hill, there are others), you will probably get good coverage
in a year or two.

Suja