More info about our plant sizes.
Penstemon strictus is evergreen with multiple spires of large violet-blue tubular flowers designed, as with all Penstemon, with the hummer in mind (and I don't mean the SUV!). This one will tolerate heavy soils better than some, but "tolerate" is the operative word, preferring well-drained gritty soil. It's profuse in the Four Corners region, Mesa Verde, and low-elevations of the Rockies. 1' - 3' tall and wide.
Minimum temperature: -40° F