UC Davis Foundation Plant Service

Yes, Andy, individuals can get VID budwood of cultivars as well, although there’s a minimum order size. Not every cultivar is available every year. Unfortunately, the site is poorly organized and hides important information in small print in pdf files. Another problem is that the process doesn’t assure you that you’ll get your requested quantity of plant material, as material is allocated after orders are received, and rose producers have priority. I’m sure that the costs are not high compared to the cost of most rosy materials.

Link: fpms.ucdavis.edu/Rose/RoseProgramIndex.html

I agree with milford clausen. I have had good luck with the rootstock from Steve Singers (Wisconsin Roses).