A:  Hey there Megan! In USDA Zone 6a/5b, providing winter protection for roses, while a time consuming task, is usually necessary to maintain their health and ensure plant viability in the following year. Grafted roses are especially vulnerable to winter damage because the graft union is sensitive to freezing temperatures. (Learn more about the difference between frost & freezing.) These types of roses are more likely to experience dieback of the top stock, making winterizing a critical step for their survival to remain true to variety. Mounding soil or compost around the base of these roses and covering with an additional layer of mulch, such as straw or shredded leaves, provides insulation and safeguards the graft union. Burlap wrapping can further protect individual plants from harsh winds, but this method, as you mentioned can be labor-intensive when managing a large number of roses.