Foothill Penstemon is a California native perennial that brings electric gentian blue tubular flowers to sunny gardens from May through July. This clump-forming beauty grows 12 to 18 inches tall and wide, producing loose spikes of delicate 1.5-inch blooms that hummingbirds and butterflies visit constantly. Hardy in zones 6 through 10, it thrives in full sun with moderate water and minimal fussing, making it a low-maintenance addition to drought-tolerant landscapes and pollinator gardens.
Full Sun
Moderate
6-10
18in H x 18in W
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Moderate
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The gentian blue flowers arrive in late spring and persist through midsummer, creating weeks of color atop narrow, medium-green foliage. Hummingbirds can't resist the tubular blooms, and the plant shrugs off deer completely. It's at home in shallow, rocky soil where many ornamentals struggle, yet needs almost no maintenance once established.
Foothill Penstemon serves as a focal point for pollinator gardens and drought-tolerant perennial borders. Its showy blue flowers and hummingbird magnetism make it a favorite in xeric landscapes and cottage gardens where water conservation matters. Rock gardens, alpine troughs, and hillside plantings showcase its natural habitat preferences beautifully.
No timeline data available yet for this variety.
Cut back stems after flowering concludes to refresh the plant's shape and encourage denser growth. Removing spent flower racemes during the bloom season extends flowering and keeps the plant looking tidy. Avoid heavy pruning in fall, which can weaken plants heading into winter dormancy.
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“Penstemon heterophyllus is native to the foothills and chaparral zones of California mountain ranges, where it grows naturally on hillsides and in grasslands at elevations below 5,500 feet. The plant adapted to these rugged, exposed conditions over generations, developing deep roots and lean foliage suited to dry summers and unpredictable moisture. The 'Electric Blue' selection captures the intensest color from these wild populations, bringing that California chaparral character into gardens far beyond its native range.”