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Idaho Penstemon (Penstemon idahoensis) is a rare, compact, clump-forming perennial native to southwestern Idaho and northwestern Utah that flourishes on sandy, tuffaceous sagebrush and juniper slopes. It produces upright stems and leathery leaves that feature small hairs that can catch dirt and dust, making the stems and leaves appear to glisten. Violet‑blue tubular flowers bloom from early to mid‑summer and attract native bees. Idaho Penstenon is exceptionally drought‑tolerant when established and adapted to lean, well-drained soils in full sun. Although Idaho Penstemon normally grows in soil mixed with volcanic ash in the wild, it has been shown to live for several years in sandy loam soil that isn't too high in organic matter. Use Idaho Penstemon in the front of xeric garden beds or borders, rock gardens, crevices, or steep, gravelly slopes. Find this adorable penstemon exclusively at Cache Valley Native Plants! 

Idaho Penstemon

$24.99Price
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  • Irrigation Requirement: Very Low (Water to Establish)

    Mature Size: 3 - 8" tall and 12" wide

    Spacing: 12"

    Bloom Colors: Purple

    Bloom Season: June - July

    Hardiness Zone: Estimated to be hardy down to a zone 5 or 6.

    Light Requirement: Full Sun 

    Deer Resistant: Unknown

    Salt Tolerant: Unknown

    Soils: Well-drained sandy soils preferred, but will also tolerate sandy loam. 

  • Plants in the Penstemon genus are known host plants for 19 pollinators in northern Utah. Penstemon also provide pollen and nectar for a variety of native pollinators. 

Open by appt only. See you spring '26!

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