Penstemon Whippleanus, or more commonly know as Whipple's Penstemon, is a subshrub forb/herb with green foliage and purple flowers of the genus Penstemon. It has a rapid 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 and summer, blooms during late summer, is somewhat tolerant of shade and is routinely available commercially. Penstemon Whippleanus or Whipple's Penstemon's floral region is North America US Lower 48, specifically in the states of Arizona, Colorado, Idaho, Montana, New Mexico, Utah and Wyoming.
Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming