Most modern roses grown in Iowa require protection during winter months.
Exposure to low temperatures and rapid temperature changes injure and often kill unprotected roses. Bush-type roses include hybrid teas, floribundas, and grandifloras. Begin by removing fallen leaves and other debris from around each plant. Removal of diseased plant debris will help reduce disease problems next season. Then loosely tie the canes together with twine to prevent the canes from being whipped by strong winds.