Unfortunately, once a rose has RRD, there is no cure. This disease mainly affects Multiflora roses which are considered invasive in many states. With any luck, RRD may take care of Rosa multiflora. In the meantime, RRD can indeed spread to cultivated roses. Knock Out® Roses are susceptible but quick removal of infected plants is often sufficient to stop the disease. The Flower Carpet® Roses have been minimally impacted; the theory is that the lesser incidence of RRD on Flower Carpet is that a lot of the breeding stock for Flower Carpet is Wichurana. If a rose bush does get infected, the normally die within 1 to 5 years, depending on the plant’s health and size.
Unfortunately, once a rose has RRD, there is no cure. This disease mainly affects Multiflora roses which are considered invasive in many states. With any luck, RRD may take care of Rosa multiflora. In the meantime, RRD can indeed spread to cultivated roses. Knock Out® Roses are susceptible but quick removal of infected plants is often sufficient to stop the disease. The Flower Carpet® Roses have been minimally impacted; the theory is that the lesser incidence of RRD on Flower Carpet is that a lot of the breeding stock for Flower Carpet is Wichurana. If a rose bush does get infected, the normally die within 1 to 5 years, depending on the plant’s health and size.