Plant Min Zone: 3a
Plant Max Zone: 8a
Sunlight: All Day Full Sun, Full Sun
Water / Rainfall: Low, Average
Soil Quality: Poor, Average
Bloom Season: Early Summer, Summer
Flower Color: Light Pink
Berry / Fruit Color: Maroon
Spring Foliage Color: Reddish Purple
Summer Foliage Color: Reddish Purple
Fall Foliage Color: Purplish Black, Red
Evergreen Foliage: Yes
Winter Interest: Yes
Scented Flowers: No
Drought Tolerance: Medium
Wet-Feet Tolerance: Medium
Humidity Tolerance: Medium, High
Wind Tolerance: High
Poor Soil Tolerance: Rocky Soils, Sandy Soils, Shallow Soils, Clay Soils, Acidic Soil (low PH)
Height: 1.5' - 2.5'
Width: 1' - 1.5'
Growth Rate: Medium
Service Life: Long: 5-10 years
Maintenance Need: Almost Zero Maintenance
Spreading Potential: Low
Yearly Trimming Tips: Trim Perennial to 3-6" Above Ground in Summer After Blooms: Forms Basal Foliage Growth.
Plant Grouping Size: Small Grouping of 3-5, Medium Grouping of 5-10, Mass Planting of 10 or more
Best Side of House: South Exposure, West Exposure, East Exposure
Extreme Planting Locations: Resistant to Rabbits, Top of Retaining Wall Locations
Ornamental Features: Long Blooming Season, Multiple Seasons of Interest, Long Lasting Fall Color, Bright Winter Color, Exceptional / Colorful Foliage
Special Landscape Uses: None
Possible Pest Problems: Root Rot Disease, Stem/Crown Disease
Plant Limitations: None
Dark Towers Penstemon, is also known as Penstemon digitalis 'Dark Towers'