300 PALMERS PENSTEMON (Beardtongue / Balloon Flower) Penstemon Palmeri Flower Seeds BLOOM TIME: Spring HARDINESS ZONE: 4 - 9 PLANT HEIGHT: 24 - 36" . . . PLANT SPACING: 15 - 18" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average - Dry Attracts bees, butterflies, and birds including HUMMINGBIRDS.