This may sound stupid, and it is not a plant for bee foraging, but if you want to attract/draw bees, how about planting some lemongrass? I grows to about 8' tall down here, and is extremely drought tolerant. It's what they use for swarm lures, after all! I certainly can't say it was my lemongrass plants, but I did catch 3 swarms in my own yard last swarm season. Just a thought! (If you can't find it, and need some seeds, send me a PM and I will send you some seeds if you are interested!) My bees are also in LOVE with Basil! Again, a plant tolerant to both wet and drought. Just my inexperienced .02!!