I bought some common comfrey seeds. I placed some in the lower refrigerator
for a few months before trying all these methods with those and the rest not
put in the refrigerator: I tried to sprout under glass (saran wrap) with
some under lights for 14 hours a day and some in darkness. I've tried some
in the garden where I want them. I've tried some wrapped in a paper towel
moistened and placed in a sandwich bag on a window ledge.

Is there a trick to sprouting comfrey seeds? and no, I don't have access to
comfrey roots.
And yes, the thought occured to me that its a bad batch of seeds.
~tom