I have never before seen wasps flock to a flower as they are to a white aster of the species variety. The plant is covered with wasps, and I don't see anything else trying to horn in. The flowers, individually, are very inconsequential. But the 3 foot high 4 foot wide clump is just covered with this little white flowers and wasps LOVE them.
Have any of you ever noticed a flower that draws wasps? I've always assumed they were not partial to nectar the way bees are. They rarely show up on a plant that is a bee magnet. Carmellia