May to June
18 to 24 in.
12 to 18 in.
southwestern United States
sun to part shade
USDA zones 4-9
hardy to 8,000 ft.
Rocky Mountain penstemon is a native perennial flower. It has an upright form and broad, dark green leaves that lay very close to the ground.
The sturdy funnel-shaped flowers of royal blue-purple are borne on one side of a spike. The beautiful flowers may last up to a month.
One of the easiest wildflowers to grow, this native plant is a good addition to low water gardens in the Pikes Peak area. It tolerates many different types of soil and is a vigorous, easy-care plant.
At the Xeriscape Demonstration Garden, this penstemon has spread to several different gardens. At full bloom, the flowers are quite beautiful and are a favorite of garden visitors.
This plant will spread easily by seed. Once the flowers are finished blooming, it's important to cut of the flower stalks to keep them from spreading too much.
Cut flower stalks down to the mat of leaves after flowering to keep the plant attractive and to minimize reseeding.