1200 BRESSINGHAM MIXED CORAL BELLS Heuchera Sanguinea Flower Seeds BLOOM TIME: Late Spring - Mid Summer HARDINESS ZONE: 3 - 10 PLANT HEIGHT: 18 - 24" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average Heuchera has tiny little flowers on stalks rising out of the leaves. Although the flowers are pretty and come in different colors such as red and white, Heuchera is prized for its lovely foliage. It attracts bees, birds, and butterflies.