Bellflower Willow Peach-Leaved Blue Campanula Persicifolia is an upright growing perennial that can be grown from bellflower seeds. Commonly called Willow Bell or Peach-Leaf Bellflower, this remarkable plant produces large, outward facing, bell-to-cup-shaped, porcelain, lavender blue flowers on a top of long, stiff stems. Bellflowers are often considered early season bloomers, and Willow Bell blooms from spring to mid summer attracting hummingbirds, butterflies, and bees.