Instead of a flower bud at the top of a mature rose cane, there is a growth that looks like empty wheat husks. This can occur with nearly all varieties but some roses are particularly prone to making blind shoots ie Peace. Frost damage, lack of nutrients, shortage of light and tiny midges are a few of the main reasons. If you cut the cane back to about half to a healthy bud it will produce a shoot which will flower.
GardenWeb Home Page | Forums | Roses Forum