Penstemon (Penstemon barbatus)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Perennial

Penstemon
Penstemon barbatus

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Features
Loosely formed spikes of flowers above a mounded plant with glossy foliage.  
 
Culture
Moist well-drained soil in a full sun to light shade location 
 
Cultivars

'Rondo' 12-18 inches tall, pink flowers

'Elfin Pink' 12 inches tall, bright pink flowers

'Husker Red' 2-3 feet tall, white flowers burgundy stems and leaves

'Coccineum' 15-18 inches tall, scarlet flowers

'Prairie Dusk' 2-3 feet tall, rose purple flowers

 
 
Mature Height
2-3 Feet
 
Size
Medium
 
 
USDA Hardiness Zone
2 - 8 
 
Bloom Color
Lavender
Pink
White
 
 
Bloom Season
June - August
 
Soil Conditions
Moist, Well-Drained
 
 
Exposure/Light Requirements
Full Sun
Partial Sun/Shade
 
 
Foliage Color
Green
Purple
 
 
Pests and Problems

Environmental Damage

Insect Damage


Additional pests and problems that may affect this plant:

Aphids
 
Additional Notes
Must have very well-drained soil for it to be a long lived perennial. Requires frequent division. May require a winter mulch.

 

 
Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic