About 8 years ago I propogated some Echinops for my customers, some had requested them, and I grew them for them the next year. I planted a couple of plants in my garden near the pump house for the pool. It has never spread and never reseeded. This year I am going to split this plant into a bunch of pieces and see what comes of it. Actually, I am right now in the process of splitting some of the perennials, they are killers, they have such tough roots systems. Need and axe for some, and man that is hard work.
I did not observe many bees on the Globe Thistle, but a few now and then. It is in the family of thistle, and I know that they bees went nuts on the Sea Holly, that was an incredible sight to see. This is a beautiful plant, enjoy the picture. Have a great and fabulous day. Cindi