Bachelor’s buttons (Centaurea) and bees are a perfect match. Bees gather nectar and pollen enabling the plants to reproduce. In turn, pollen feeds baby bees, and nectar is turned into honey to be enjoyed by the bees and you. Everyone’s happy.
Annual and perennial selections of bachelor’s buttons are available. The annuals (Centaurea cyanus, C. imperialis), found in shades of white, pink, yellow, purple, and blue, also are referred to as cornflowers.
The perennial version is a shade of blue that blooms early in summer, and sometimes again in late fall. They’re sometimes referred to as mountain blue buttons. Annual and perennial varieties produce an ample supply of nectar.