Penstemon eatonii
Light: Full sun to light shade; afternoon shade is beneficial in Phoenix, especially near heat-reflecting walls.
Water: Low water once established; water deeply, then allow soil to dry between waterings. Provide occasional supplemental water during prolonged dry spells, avoiding frequent summer irrigation.
Soil: Very well-drained sandy, gravelly, or rocky soil; tolerates alkaline soil. Avoid heavy, persistently wet soil and excessive fertilizer.
Mature size: 2–3 feet tall in bloom and 1–2 feet wide; foliage remains lower.
Bloom: Late winter through spring in Phoenix, typically February–May; timing varies with weather and exposure.
Evergreen / deciduous: Generally evergreen in Phoenix; foliage may decline during extreme summer heat or drought.
Growth rate: Moderate to fast during the cool growing season; slows in summer heat.