But once it got cold, that tree rose, particularly the graft union, had to be protected from winter temperatures and winds.

Winterize roses after a hard freeze and consistently cold weather. Doing it too early can cause decay around the crown of the plant or stimulate late fall growth that fails to harden off for winter.

or bushy shrubs. While they can benefit from winter protection, they are more likely to survive subzero temperatures. Less hardy roses include hybrid tea, English, polyantha, floribunda ...