2000 POLKA DOT MIXED COLORS BACHELOR'S BUTTON / CORNFLOWER Centaurea Cyanus Flower Seeds BLOOM TIME: Early Summer - Fall HARDINESS ZONE: Annual (but reseeds itself easily, so it acts like a perennial in all zones) PLANT HEIGHT: 28 - 36" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL/WATER: Average Makes an excellent cut or dried flower. Bachelors Buttons bloom just 10 - 12 weeks after their seeds are sown.