Its been around for a long time and its an introduction that has stood the test of time. This low mounding evergreen perennial is beyond delightful when it alights in masses of deep blue flowers from late February to late April. Each simple blue flower has a small white eye but the effect from a distance is a pool of blue. To 8″ tall and forming large 2′ x 2′ wide patches in full sun in rich to average well drained soil. It excels on slopes and in rock gardens. The new growth that follows is tinted mahogany before become strong glossy green. Cut back by 1/3rd after blooming to create a much denser and ultimately more floriferous plant. Light, consistent summer water. Excellent bold backdrop to early and mid blooming bulbs. We suggest large white Crocus vernus followed by Narcissus ‘Blushing Lady’. Very easy to grow. Long lived for a speedwell.
Sturdy spire of a perennial with symmetry in mind. Whorls of pointed foliage lines the stems on the 5′ tall plants. At the top vertical spikes of fine periwinkle blue/rose flowers appear and grow. They remain pretty for weeks. In fall the still standing stems take on bright yellow fall tones and holds it for several weeks. Full sun and rich, well drained soil with regular summer irrigation Becomes more tolerant of drought with age and establishment. This form is popular for its occasional tendency to fasciate. A harmless contortion of the flower spikes. Cool cut flower. Blooms June/July and mixes ideally with perennials of the same soft vertical texture. Panicum virgatum ‘Heavy Metal’ is an ideal candidate. Loved by butterflies and hover flies as well as bumbles. Long lived perennial. Emerges annually in mid-spring. Excellent prairie component.
The white flowered form of culvers root- but seldom called that in the PNW. Slender perennial with multiple vertical stems clad in symmetrically space pointed foliage surrounding the stem. At the tips in early summer multiple spires of pure white flowers give a really cool ethereal effect. Massed it is simply one of the coolest plants. Our form rises to just 4′ tall and forms slowly increasing clumps. In autumn the foliage that lines the stems often turns bright yellow and remains for a while- a second season of interest. Full sun to the very lightest shade in any soil of good fertility. Does well even in unamended clay as long as summer water is dependable. Long lived perennial that never requires division or fussing. Cool cut flower for big wild arrangements. Bees love it.
Obscure perennial hybrid that has yielded a wonderful perennial. Evergreen rosettes of fleshy scalloped green leaves look good year round. From February to June (yep.) 10″ spikes are covered in violet blue tubular flowers. The display is continuous for months. Part shade in rich, well drained soil with regular summer water. Mass for a stunning effect for months. A natural for PNW woodlands. Cold hardy and easy to grow. Not bothered by slugs or snails. Excellent perennial that has amazed us with its long, uninterrupted bloom period which is continuously showy with no intervention from the gardener. Mix with spring blooming perennials. Mine makes its life with regular old wild Primula vulgaris. I love the soft yellow flowers paired with this violet-blue hue. Easy, showy, and carefree perennial. This plant has everything needed for greatness. Too bad its so obscure. We intend to change that.