Knock Out® Roses & Late Frost in Zone 6: To Cover or Not?

Rose Frost Biology

Bud eyes produce three leaf sets without vigor loss. If frost kills set #1, sets #2 & #3 emerge. The plant barely notices.

Best Action

1. Do nothing — let nature run its course
2. Assess after 2 weeks — prune only clearly dead tips
3. Expect minor delay — first flush may be 2 weeks late

Exception

If forecast drops below 20°F for extended periods, a loose, breathable cover (frost cloth, not plastic) overnight might help. But 25-30°F? Your Knock Outs will laugh it off.

Save your energy. These roses are tougher than you think.