late May through mid-June
8 to 18 in.
12 to 24 in.
Wyoming to Oregon
sun, part shade
USDA zones 4-9
hardy to 7,000 ft.
Bush penstemon is a compact subshrub with dark green, succulent-looking leaves. In early summer, it grows short spikes violet-blue tubular flowers. The leaves of this penstemon tolerate the bright winter sun well, adopting a glossy, rich burgundy color.
Bush penstemon is a native plant found in the northwest mountain states. Grows well in rocky soil.
There are a few specimens of bush penstemon at the Xeriscape Demonstration Garden that have survived for many years. The flowers are very attractive.
Prune out winterkilled branches as needed.