Overview
Penstemon (Penstemon spp.), commonly called Beardtongue, is a native North American perennial prized for its tubular flowers and outstanding garden performance. 'Husker Red' (P. digitalis) is one of the most celebrated Penstemons — it was the Perennial Plant of the Year in 1996. It features deep burgundy-red foliage that holds color all season, topped with white flowers flushed with pink in early summer. Exceptionally tough, deer resistant, and attractive to hummingbirds.
Sun & Exposure
- Ideal: Full sun (6+ hours daily)
- Tolerated: Part shade — foliage color is most intense in full sun
- 'Husker Red' is one of the more shade-tolerant Penstemons
Watering
Moderately drought tolerant once established.
- Water regularly during the first season to establish
- Established plants are drought tolerant; water during extended dry spells
- Well-draining soil is important — does not tolerate wet feet, especially in winter
Soil & Planting
- Well-draining, average to lean soil
- Neutral pH (6.0–7.5)
- Plant in spring; space 18–24 inches apart
- Does not require rich soil — excess fertility produces floppy growth and reduces flowering
Fertilizing
- A light application of balanced fertilizer in early spring is all that is needed
- Avoid high-nitrogen fertilizers
Pruning & Deadheading
- Deadhead spent flower spikes to encourage rebloom
- After the main flowering season, cut back to the basal rosette
- Leave foliage intact through winter — the deep red leaves of 'Husker Red' are striking in the winter garden
- Cut back in early spring before new growth emerges
Winter Care
Hardy in zones 3–8. 'Husker Red' (P. digitalis) is one of the hardiest Penstemons. Semi-evergreen in mild winters. Excellent drainage is the most important factor for winter survival.
Common Issues
Problem
Crown rot
Cause
Wet soil, especially in winter
Problem
Floppy growth
Cause
Too much shade or overly rich soil
Problem
Short lifespan
Cause
Normal in hot, humid climates; ensure excellent drainage
Tips
- The burgundy foliage of 'Husker Red' is stunning from spring through winter
- Hummingbirds are primary pollinators and visit frequently
- Deer and rabbit resistant
- Excellent in naturalistic, prairie, and dry border plantings
- Pairs well with Echinacea, ornamental grasses, and Rudbeckia