Bees reportedly love safflower, but it does not make good honey. Good for the bees, but not for the beekeeper who wants honey from the hives. Other good plants besides clover are alfalfa, vetch, birdsfoot trefoil, wild mustards, phacelia (excellent plant in a wildflower setting), chickory, sainfoin (I wish our climate here would support growing this one), lima beans, buckwheat, Simpson's honey plant which should be good for your climate, mountain mint, button bush (cephalanthus occidentalis), and there are lots of others. The main thing to remember in planting for bees, is that they generally forage in about a 2 mile radius, so what they are getting off of your place is just a small part of that unless you own 8,000 acres. I have a field that I planted in clover, alfalfa, vetch, and wildflowers, but it will be just a portion of their nectar supply. There are a couple of good websites I have found with info on bee forage. I'll be happy to look up the links if you are interested.