I compost all of my roots, stems and leaves after I let them dry out. Using the traditional compost method, I add both food scraps (greens) and carbon sources (browns) to balance the mixture. I treat the leaves, stems, and roots as a browns since they are dried to a crisp. Since the composter is indoors, I usually have ready to use compost in 6 weeks.

I see no problems with using wastes in vermicomposting. All the roots, stems and leaves still have nutrients locked within that can be reused. Any sort of composting is better than throwing out the materials. My plants respond very postive to the compost.