Pristine Blue - Beardtongue (Penstemon)

Pristine® Blue is an upright Penstemon selected for vivid blue flowers above glossy green foliage. Its summer display suits sunny borders, rock gardens, and containers, while the tubular blooms attract butterflies and hummingbirds. ## Plant Profile The grower profile lists mature plants about 16–20 inches tall and 16–18 inches wide, with flowers from early through late summer. Dümmen Orange identifies Pristine® Blue as code 81037 in its Pristine series, with blue flowers, green foliage, and a well-branched habit. The profile lists USDA zones 3–9. ## Growing Conditions Give it full sun and ordinary, sandy, or clay soil; the profile describes average, dry, or moist soil conditions. Once established, it tolerates drought. Its compact mound works near the front of a border or in a container where the blue flower spikes can be seen. ## Maintenance Remove faded flower stalks to encourage continued bloom. Divide the clump in early spring if it becomes crowded, and provide well-drained soil for reliable perennial growth. [Dümmen Orange](https://na.dummenorange.com/app/en/products/usa/penstemon/pristine-blue/PAT_81037) identifies the exact selection; size, zones, garden uses, and care are from the [Pristine Blue plant profile](https://www.perennials.com/plants/penstemon-barbatus-pristine-blue.html).