Variety traits

Plant Height — Penstemon

Penstemon Schmidel.

A morphological parameter measured from the soil level to the top of the inflorescence during the peak flowering period. Depending on the species, the height varies from miniature forms of 10 cm to tall specimens reaching 150–300 cm.

In the reference 12 varieties crop Beard Tongue, where this is mentioned in the description.

For the genus Penstemon, plant height is a key breeding and agrotechnical trait. Low-growing forms (10–30 cm) are primarily used in rock gardens and borders, medium-height forms (40–80 cm) occupy an intermediate position, and tall varieties (90–150 cm and above) require placement in the background of landscape compositions.

Plant height directly determines planting density: compact plants require a smaller feeding area, whereas tall, often spreading forms need more space to ensure proper aeration and the prevention of fungal diseases. For tall representatives with thin stems, resistance to lodging from wind loads is also evaluated, which is critical for ornamental value and cut flower quality.

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.