Eastern North American native penstemon with tall spires of pure white tubular flowers above clumps of dark-green basal foliage. The cultivar ‘Husker Red’ adds deep-red foliage to the contrast.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–8 | −40 °C to −6.7 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 3–8 | −34 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in sunny mixed borders and prairie plantings — tall white spires hover beautifully above shorter neighbours
- Excellent bee plant — long-tongued bumblebees particularly favour the tubular flowers
- Distinct from the base Penstemon spp. entry already in the database — Penstemon digitalis is the hardiest and best-known eastern North American species
- Drought tolerant once established
Categories
Related plants
Cross-check Foxglove beardtongue against your zones