Variety traits

Plant height — beardtongue

Penstemon Schmidel.

Penstemon height is a variable species trait, ranging from 15 to 120 cm, which determines the methods of utilizing the crop in landscape design.

In the reference 7 varieties crop Beard Tongue, where this is mentioned in the description.

Representatives of the genus Penstemon demonstrate significant variability in stem height: dwarf forms reach 15–25 cm, whereas tall-growing perennials can grow up to 100–120 cm. In agronomic practice, height is measured from the soil surface to the highest point of the inflorescence or shoot.

In floriculture, it is standard practice to divide plants into low-growing (up to 40 cm, including such species as P. nitidus and P. hirsutus var. minimus) and medium- or tall-growing (from 60 to 120 cm). This indicator determines the plant's position in the landscape: low forms are suitable for rock gardens and borders, while tall ones are suited for the background of flower beds.

For tall-growing cultivars, stem strength is of significant importance, as excessive nitrogen nutrition or adverse weather conditions can lead to lodging of the inflorescences. When grown for cut flowers, stem height is a key factor for marketability and ease of produce transportation.

General information about the subject — on the page Plant height.

Sources8

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.