200 BLUE CANTERBURY BELLS - CAMPANULA Medium Flower Seeds *Comb S/H BLOOM TIME: May - July HARDINESS ZONE: 3 - 9 PLANT HEIGHT: 32" . . . PLANT SPACING: 10" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average Canterbury Bells are one of my favorite Campanulas. The flower stalks covered in 2 wide single bell-shaped blooms make an excellent cut flower. They will attract birds, bees, & butterflies.