Question: what is the difference between hybrid tea and grandiflora roses?
Answer: Hybrid tea roses, like "Peace" (Rosa "Peace"), hardy in U.S. Department of Agriculture plant hardiness zones 5 through 9, usually feature single blooms atop tall stems. Grandiflora roses, like "Queen Elizabeth" (Rosa "Queen Elizabeth"), also hardy in USDA zones 5 through 9, bear flowers in clusters.