
A tree rose is actually a grafted rosebush. The bottom part that forms the trunk can be another rosebush that is grown for its long canes and then a desired rosebush grafted on top of a cane. Some are also grafter on the top part of a young apple tree. So, if cutting of the canes are taken from the top part of the rose tree and rooted, you will get a typical rosebush not a tree rose. In some cases the root system of such rosebushes from cuttings is not strong enough to survive winter in harsh climate zones. Here is a link to an article on tree roses for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/learn-more-about-tree-roses.htm