A Colorado native, this wildflower is becoming rare and endangered in its homelands mostly due to invasive weed species crowding it out rather than over-collecting.
It has intense cobalt blue flowers held above an evergreen rosette of shiny green foliage.
In the UK it must be grown in a very gritty, free draining soil in full sun.
Penstemon are extremely drought tolerant once established and simply hate wet feet.
The common name “beardtongue” is because some varieties have a hairy-looking tongue ( an infertile pollen sac) which protrudes from the throat of the flowers.
Photo: © Jelitto
Very well drained