I have never thought about bees in winter - much. Interesting.
I have Mahonia (although it is "invasive" in many states) and it is really fun to see bees out on the milder midwinter days going to those flowers. They smell nice too if you can get close enough with that super-prickly foliage. I have an article at DG on it.
Witch hazel is on my wish list too!
A nice thinking-spring topic!
