Right now, for a few weeks, they are in bloom and are blooming like crazy. During the couple of hours in the morning when the flowers open, a zillion bees show up. So many bees are here that you can hear the buzzing from a few feet away. The bees don't bother people - they are too busy. Every bee I saw had big bags of pollen on it's legs and was trying to pack in more.
They seemed to like to burrow in the center of the flower and practically roll around. Some were so covered with pollen that they look like they'd been rolling in sugar.