Rambling Rector is a fantastic rose that will achieve 20feet plus when fully grown. My own rose was still holding some flowers in december!! It is possible to make 8-10 feet of growth in a single season as long as the weather is on your side. All new plants need to be well watered for their 1st year, in order to establish well, and roses are no exception. When planting, make sure you plant 2 feet from the wall or fence that your growing it up, to ensure the rain reaches the roots, and water heavily, once a week, in hot weather. Giving it a thourough drenching with several cans worth of water is better than watering a little but often(that simply encourages weak surface roots).lastly, in may/june give your rose a good feed with rose feed or tomato feed, to boost those blooms.