Regions / Eastern Washington, Eastern Oregon, And Idaho
Selecting plants suited to the Eastern Washington, Eastern Oregon, and Idaho climate is a key step to success.
A plant's performance is governed by many climate related factors including the length of the growing season, the amount of rainfall, winter lows, summer highs, wind or humidity. Various initiatives have taken place to determine how well plants would withstand the cold winter temperatures (Plant Hardiness Zones) or when plants would start suffering from the heat (Plant Heat Zones). A more sophisticated approach has been followed by Sunset which defines Climate Zone Maps based not only on hardiness or heat tolerance, but also on precipitations, wind, humidity and various other climate related factors.
Salvia azurea var. grandiflora (Pitcher Sage) is a clump-forming, shrubby perennial with beautiful wands of sky blue flowers, up to 12 in. long (30 cm). Blooming from midsummer to frost, the elegant flowering wands are borne on slender stems clad with long, narrow, grayish-green leaves. Hardy, this Salvia enjoys an upright habit until midsummer, but will sprawl over nearby plants when it begins to bloom.
Abies amabilis ‘Spreading Star’ is a low-growing, evergreen conifer forming a widely spreading mound adorned with thick, overlapping, horizontal to arching branches clothed in a lush foliage of fluffy, green, long needles with silvery undersides. Slow-growing, 3-4 in. per year (7-10 cm), this Pacific Silver Fir is a great choice for small gardens or rockeries.
Highly popular, Abies balsamea ‘Nana’ is a dwarf, aromatic, evergreen conifer of globose habit forming a broad mound with numerous short branches, adorned with a lush foliage of dark green needles radially arranged around the stems. Slow-growing, 2-3 in. per year (5-7 cm), this Balsam Fir is a great choice for small gardens or rockeries. Perfect for adding year-round color to the garden.
Abies concolor 'Archer’s Dwarf' is a dwarf evergreen conifer of regular, conical habit adorned with slightly ascending branches clothed in soft, silvery-blue, slightly incurved needles. Slow-growing, 3-4 in. per year (7-10 cm), this White Fir is a great choice for small gardens, containers or rockeries.
Regarded as the bluest of all conifers, Abies concolor 'Candicans' is a magnificent large evergreen conifer. Forming a dense pyramid when young, it matures to a columnar, highly symmetrical shape with handsome layered branches smothered by long, silvery-blue needles.
A deservedly popular White Fir, Abies concolor 'Compacta' is a slow-growing dwarf evergreen conifer of great beauty. It forms a dense, compact mound of irregular, spreading shape, unless it is sheared to a conical form. Its branches are beautifully clothed with long and slender, powder-blue needles
Abies concolor 'Hosta la Vista' is a dwarf evergreen conifer of globose habit, beautifully clothed with long, thick, slightly recurved, blue-green needles adorned with a glaucous, powdery coating. Slow-growing, 1-2 in. per year (2-5 cm), this small White Fir brightens up the garden and makes a lovely addition to small gardens, rockeries or containers.
Abies koreana 'Alpin Star' (Korean Fir) is a dwarf, evergreen conifer of compact, upright, irregular habit densely clothed in incredibly dark green needles, adorned with white undersides. Slow-growing, 1-3 in. per year (2-7 cm), this Korean Fir is a great choice for small gardens, containers or rockeries.
Abies koreana 'Aurea' (Korean Fir) is a desirable evergreen conifer of globe-shaped habit when young, becoming broadly pyramidal over time. Its ascending branches boast short, bright golden-yellow needles adorned with silvery-white undersides in the spring. As the season progresses, the golden coloration takes on a softer shade, almost turning light green. Abundant purple cones are held upright along the branches, creating a lovely contrast against the foliage. A slow grower, 3-6 in. per year (7-15 cm), this golden Korean Fir makes an eye-catching specimen accent. Mature plants can tolerate full sun, but juvenile plants prefer some shade.
Abies koreana 'Blauer Eskimo' (Korean Fir) is a dwarf, evergreen conifer of globose habit adorned with short and stubby branches clothed in blue-green needles and prominent resin covered buds which are ravishing in winter. Slow-growing, 1 in. per year (2.5 cm), this Korean Fir is a great choice for small gardens, containers or rockeries and makes a lovely specimen plant when grafted onto a standard.
Abies koreana 'Green Carpet' (Korean Fir) is a dwarf, evergreen conifer forming a compact, flat, round cushion adorned with attractive fresh green needles in spring, turning dark green over the summer. Abundant purple cones are held upright along the branches, creating a lovely contrast against the foliage. Slow-growing, 2 in. per year (5 cm), this Korean Fir is a great choice for small gardens, containers or rockeries and makes a handsome groundcover.
Abies koreana 'Kohout's Ice Breaker' (Korean Fir) is a dwarf, evergreen conifer of globose habit when young, developing into a small, broadly pyramidal tree over time. Its short and stubby branches boast a ravishing foliage of strongly-curled needles showing off their silvery-white undersides, creating a striking shimmering silvery-blue effect in the garden. Slow-growing, 1-3 in. per year (2-7 cm), this Korean Fir is a great choice for small gardens, containers or rockeries.
Abies koreana 'Silberperle' (Korean Fir) is a miniature, evergreen conifer of globose habit when young, becoming a small squat conical tree over time. Its compact branches are adorned with short, slightly twisted, deep green needles which expose their silvery undersides, creating a lovely bi-color effect. Equally attractive are its resin covered buds which resemble silver pearls. Slow-growing, 2-3 in. per year (5-7 cm), this desirable Korean Fir is a great choice for small gardens, containers or rockeries.
Abies koreana 'Silver Show' (Korean Fir) is an evergreen conifer forming a compact pyramid with tightly curled needles, exposing the silvery-white undersides. Abundant purple cones are held upright along the branches, creating a lovely contrast against the bi-color foliage. A moderate grower, 6-10 in. per year (15-25 cm), this Korean Fir makes an eye-catching specimen accent.
Abies lasiocarpa ‘Green Globe’ is a semi-dwarf, evergreen conifer of globose habit when young, becoming conical over time, and clothed in a lush foliage of short, soft, green needles. Slow-growing, 3-6 in. per year (7-15 cm), this Alpine Fir is a great choice for foundation plantings or rockeries.
Stately and elegant, Abies nordmaniana 'Golden Spreader' is a slow-growing evergreen conifer of great beauty, particularly in the winter garden. While this dwarf Nordman fir sports a soft green color in summer and fall, its needles turn bright golden-yellow in winter.
Abies procera 'Blaue Hexe' (Blue Noble Fir) is a desirable, dwarf, evergreen conifer forming a flattened globe adorned with short, bright powdery blue needles. Slow-growing, 1.2 in. per year (2-5 cm), this attractive Blue Noble Fir is a great choice for small gardens, containers or rockeries.
Stately, Abies procera 'Glauca' (Blue Noble Fir) is a large sized conical conifer with short, bright blue-gray needles on both the top and underneath. In fall, eye-catching, large blue cones, up to 9 in. long (25 cm), appear upright on the branches before turning reddish brown over time.
Stately and dramatic, Acanthus hungaricus (Bear's Breech) is an upright, clump-forming perennial boasting strikingly elegant spikes of hooded, pink-flushed to white flowers adorned with spiny, red-purple bracts. Blooming from early to mid-summer, they rise well above a superb foliage mound of long, shiny, deeply-cut, basal olive-green leaves, which usually remains attractive throughout the growing season.
Noted for its exfoliating bark and showy fall color, award-winning Acer griseum (Paperbark Maple) is a small spreading deciduous tree that is highly desirable. The chestnut-brown bark of both its trunk and branches constantly peels into thin, tight curls, revealing brighter cinnamon-red wood beneath.