Red Canes on Subzero Roses
by ann greenwald
(Albany, New York)
My 3 year old deep pink sub zero rose has suddenly grown this section of deep red cane. What is it? Why? Is it a problem? Should I cut it out?
Ann GreenwaldBotanical Journeys Plant Guides
Ann, I'm sorry to tell you that I suspect your Subzero rose
has been infected with rose rosette disease
. (There are lots of pictures on this page to help you confirm this diagnosis.)
Rose rosette is a fatal disease spread by mites. One of its primary symptoms is the sudden appearance of red canes and/or leaves.Rosa multiflora
is the main host of this deadly rose disease
If there is a stand of multiflora
roses near your yard, you can be almost certain that this is what your plant is suffering from.
There is no cure.
In order to protect any other roses in your collection, you should remove the plant immediately.