Deep blue (with some lilac shades) flowers in summer, on an upright stem, above clumps of narrow leaves. From canyons and mountains, in some of the Rocky Mountain states, USA. Worth trying in drier garden spots than the typical penstemon hybrids.
Penstemon strictus
Rocky Mountain penstemon
Details
| Aspect | Full sun |
| Flower Colour | Blue | Purple |
| Flowering Period | May | Jun | Jul |
| Foliage | Not evergreen |
| Goes Well With | Caryopteris, Festuca,Stipa |
| Growth Habit | Upright |
| Hardiness | Fully hardy |
| Height | 60cm |
| Soil | Light, well-drained |
| Spread | 30cm |
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