Re: What varieties of clover encourage the bees?
I'm in zone 9, and dutch clover is wonderful. The only prob is, people used to seed it in their lawns to help with nitrogen so the lawn grasses did not need to be fertilized. Now everyone sprays broadleaf and uses weed n feed fertilizer and all the dutch is gone in the neighborhood. I used to live next to a county park, the clover was coming in pretty good after a couple years, then all of a sudden it was all gone, I'm assuming they sprayed with broadleaf. If it's irrigated and mowed, you can greatly extend it's season here to last a couple months or longer.
I've been keeping a few hives for the past 20-25 years, and no longer treatment free as I got tired of the losses.