Many gardeners steer clear of roses in an attempt to avoid the difficulties that may come with growing them. However, in 2000, a rose became available that was low maintenance and disease resistant. Knock Out® Roses soon became a landscapers dream and a customer favorite. But, in recent years, the brand and shrub roses alike have taken a tremendous hit. Despite bouncing back from our recent harsh winter, Knock Out® Roses one nemesis can still take them out — Rose Rosette.