Answer: There are many varieties of "growths" like the slime molds and assorted lichens and so on and as a rule they are simply a normal part of the decay process or basically harmless. As long as they are growing on dead material such as mulch they should not present a problem. If however they are growing on a live plant such as the rose canes themselves, then it is possible that it is something other than a relatively benign occurrence, but unfortunately I am unable to identify it for you on the basis of your description. You might wish to take a photograph or a sample to your County Extension (885-8985) for help in identifying it. Enjoy your "new" garden adventure!
Q&A Library Searching Tips