Prairie Twilight
ActivePenstemon Schmidel. · Beard Tongue
Lindgren Dale T.|North Platte, NE, US / Schaaf Daniel M.|North Platte, NE, US
Variety traits
Frost Hardiness of Penstemon
Penstemon Schmidel.
The ability of Penstemon to tolerate winter temperatures, measured by USDA hardiness zones, which is critically dependent on soil drainage, freeze-thaw cycles, and snow cover stability.
In the reference 9 varieties crop Beard Tongue, where this is mentioned in the description.
Frost hardiness of the genus Penstemon is determined by USDA climate zones, where the most hardy species, such as P. digitalis and P. hirsutus, are capable of withstanding temperatures down to -34°C. Meanwhile, hybrid forms originating from warmer regions, such as P. ×hartwegii, possess low hardiness and require protection or relocation to frost-free areas.
A key factor in the winter survival of Penstemon is not only the temperature minimum but also the condition of the root system under high moisture conditions. Waterlogging triggers crown rot; therefore, for species with moderate frost hardiness, excellent drainage is mandatory, and mulching is applied to prevent death from sudden temperature fluctuations.
General information about the subject — on the page Frost hardiness.
Varieties of Beard Tongue mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Lilliput
TerminatedPenstemon Schmidel. · Beard Tongue
A T Yates & Son