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Plant Description and Details
Tall stems with blue, purple, pink, even sometimes yellow/white trumpet flowers are borne on a low basal clump of paddle-shaped leaves. The species, "attenuatus" is named for the leaves - the Latin means "tapering gradually to a slender tip."Leaves are bright green with smooth edges. Found over a wide range of environmental conditions.
| Common Names | Sulphur Penstemon, Taper-leaved Penstemon |
| Community | Foothill |
| Annual Water Needs | 15-20 inches |
| Drought Tolerant | Yes |
| Native Range | Meadows, ponderosa pine woods, lowlands to mountains, ID, OR, WA & MT |
| Native States | ID, MT, OR, WA |
| Hardiness | Down to Zone 4 |
| Exposure | Sun |
| Soil Preference | Well Drained |
| Placement | Back row of a perennial bed, embankments, rock gardens, meadows. |
| Mature Width | 10 in. |
| Group Spacing | 10-15 in. |
| Blossom Color | Blue or Purple or Yellow |
| Blooms | Late Spring |
| Establishment Tips | Water at planting and 2-3 times deeply the first summer. |
| Wildlife | Pollinators |
| Plants Symbol | PEAT3 |
| Family Name | Scrophulariaceae |
| Lewis & Clark | No |
