Protecting Knock Out Rose Tree in Winter

Got a call today from someone who has Knock Out rose “trees,” wondering about winter protection. I know the bushes aren’t supposed to need protection, but can’t find anything about the “trees.”

Knock Out tree rose is grafted. So the best way to overwinter is to move the tree rose to an unheated garage. Pack stuff around the pot for added insulation. Water whenever the soil is thawed and dry. The other option is to bury the whole plant (what a pain) in the ground for winter.