New plant for my bee garden

I had a few Tomato plants too many and thought to give them to my neighbours who were very helpful in the past. They were happy about the tomato plants and we talked a bit in their garden. I noticed one very unusual flower and I asked about it. My neighbour didn't know much about it except that its a perennial plant and grows like a weed and added that I can take some if I want to :) of course I took a bunch and am hoping to create a large flowering patch with it :) I didnt knows its name and after a long search through my books I found its called Centaurea montana or Mountain Cornflower (in Swedish Blåklinta).

I was happy to read that it flowers from May to August and I've seen Bumble Bees feeding on these flowers. I understand that Honey Bees aren't generally interested in just a few flowers because Scout Bees usually are much more interested in those flowers which dominate their environment (in a 3km radius).