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[Campanulastrum americanum] Tall Bellflower
Plants grow 4 to 6 feet (6 ft = 1.83 m) tall and have narrow stems with many small, star shaped, blue flowers. The flowers are spread-out along the top 2/3rds of the stems. The blue flowers have white centers. Best in full sun in moisture retentive but well draining soils that do not dry out. They will grow and flower well in areas with open shade, but tend to be tall and lax in heaver shade. When used in shade, they work well mixed with other tall plants that they can grow up threw, which can give them some support. Blooms late spring threw mid summer with some flowers remain into late summer. The blue flowers are flat faced instead of bell shaped and because of this difference and its native range are placed in its own genus.
Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.