Deep in the heart of downtown Edmonton is a wonderful green roof atop the offices of Stantec. I was fortunate to visit this green roof during my speaker/lecture tour of Alberta back in June. The green roof could be considered a green roof designed for native biodiversity. Much of the planting is native and, certainly when I was there, there was a lot of bee activity.
Amongst the flowers I managed to identify were Brown-eyed susan, Nodding onion, Showy aster, Yellow beardtongue and Smooth blue aster.
The bees seemed particularly attractive to two other plants. Two-grooved milk vetch and a Richardson’s Alumroot.