- Name: Sensation Mix Penstemon - Other Common Names: Hartwegii Penstemon / Beardtongue - Scientific Name: Penstemon Hartwegii Sensation Mix - Color: Mixed Colors - Two Tone Red, Pink, White, Purple With White Throats - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Plant Height: 28 - 32" - Plant Spacing: 18" - Bloom Time: June - Sept - Hardiness Zone: 8 - 10 - Light Requirements: Sun - Part Shade - Soil & Water Preferences: Average - Quantity: 100 Seeds - Other: Attracts Bees, Butterflies, And Birds Including Hummingbirds Who Enjoy The Colorful, Tubular Flowers Of The Penstemon. They Are Native To Mexico And Have A Very Long Bloom Season.