I could be wrong, but I would have thought buttercup was a source of pollen, if anything. I'll see if I can find out in my wildflower book. The best winter sources here are wild- dandelion and henbit.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Beesource Beekeeping Forums
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!