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A yellow-flowered form of the beautiful Red Yucca. Evergreen and drought tolerant! The birds and the butterflies will love you for planting this. Mature size: 4-5 ft T x 1-2 ft W Minimum temperature: -20° F

Whispy, yellow-green leaves contrast deep, sky-blue flowers in late spring-fall. The overall form is dense & upright and it spreads via rhizomes. As the common name 'Bog Salvia' indicates, this salvia is unusual in that it tolerates wet sites and regular perennial border watering. Perennial; mature size: 4-6 ft T x W Minimum...

Needle-like foliage hugs the ground and trails over rockery. Super-sized flamboyant deep rose-pink flowers shout from wiry 3-4 inch stems. Evergreen, spreading mat 1-2 inches T Minimum temperature: -40° F

Early- to late-spring blooms have white falls with dark purple eyelashes and veins; signals & styles are a butter yellow. Upright, strappy, medium-green, deciduous leaves. Clumping, deciduous perennial; mature size: to 3 ft T Minimum temperature: -30° F

Fragrant, electric cobalt blue flower clusters in spring and -- if you cut in back -- summer flowers, too! Delicate, bright green foliage. Best with summer water or leaves will bronze a bit. Pollinated by bees. Mature size: 2 feet tall & 16 inches wide Minimum temperature: -20º F

An eastern North American prairie grass growing 2 – 4 feet tall, 'Standing Ovation' has blue-grey leaf blades with red tips. Purplish-bronze flowers rise in late summer in 3-inch long racemes on branched stems above the foliage. Fall color is reddish-maroon and persists late into winter. Mature size: 2-4 ft T x 1-2 ft...

German for "snow white" this is a great rock garden plant. Masses of little white blooms in spring cover the dark green mat of narrow leaves. Semi-evergreen mat; Mature size: to 6 in T x 24 in W Minimum temperature: -40° F

Bright magenta pin cushions bob on wiry stems above sage-green, fluffy basal leaves. They bloom late spring to autumn frost! Butterflies love the flowers and birds love the seed-heads. Drought tolerant! Shorter-lived (~3 years) perennial that will seed itself around a dry meadow or your cottage border in a non-invasive manner. Fills...

A narrow, upright, dense focal point for the small garden! Spring leaves are bright green turning darker in the summer heat. Then brilliant red in fall. Columnar, deciduous tree; mature size: 10-18 ft T x 4-5 ft W Minimum temperature: -20° F

Creamy white petals tinted with lavender and a dark purple eyelash pattern. Styles & signals are bright yellow. Give this one lots of water: it's happy in bog- and marsh-like conditions. Mature size: Clumping; 40 inches tall x 18-24 inches W Minimum temperature: -30° F

This is an elegant candelabra form primrose shows shades of white, pink, purple or red. Perfect for your stream-side or pond-side planting. Clump-forming plants have stems to 2 ft tall in moist rich soil. Minimum temperature: -30° F

A beauty with lilac standards and violet blue falls sometimes with marbling. A deep violet halo encircles deep yellow signals and white styles. Mid-season bloom. Mature size: 3.5 ft T Minimum temperature: -20° F

'Sparkling Arrow' is a variegated form of C. nootktensis 'Green Arrow' that originated as a variegated color sport found in 2001 by Buchholz Nursery, Gaston, Oregon A vertical, flowing focal point that makes an excellent specimen tree, 'Sparkling Arrow' is green splashed with creamy yellow and will grow more slowly than 'Green Arrow'...

A ground-hugging dwarf conifer with bright, lemon-yellow spring growth. Very cute and very slow-growing. (Final picture with pink tips shows winter color.) Mature size: 4 inches tall by 2 feet wide in 10 years. Minimum temperature: -50° F

A North American native beauty, found in moist, shady woodland conditions. In spring, dangling, greenish-white blooms are spaced at each leaf node along somewhat zig-zagging, arching stems. Mature size: 24-36 inches T x W Minimum temperature: -40° F

Vivid blue flowers are born on short stems over a long season starting midsummer on compact, dense plants. Reliable and relatively easy to grow rock garden plant. Mature size: 4 inches T x 6 inches W Minimum temperature: -40° F