Overwintering roses in pots
So this is a question for the future, winter of 2008. Next spring I want to plant two climbing roses in square, plastic 18" pots that sit on either side of my arbor. I want this to be a permanent situation and am wondering if a climber (like Brother Cadfael CL or Dorothhy Perkins perhaps) can make it here in Northern CA outside. We generally get down to no colder than 10 degrees. There is the rare cold snap taking us just below zero. That is unusual though. All my other roses are in the ground so this is uncharted territory for me. Since the flower will be growing on the arbor if all goes well I clearly could not bring it inside or shelter in any kind of structure.