Penstemon Rydbergii, or more commonly know as Rydberg's Penstemon, is a subshrub forb/herb with green foliage and blue flowers of the genus Penstemon. It has a moderate growth rate and a height of 3 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring, blooms during mid summer and is intolerant of shade. Penstemon Rydbergii or Rydberg's Penstemon's floral region is North America US Lower 48, specifically in the states of Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington and Wyoming.
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