Graham Stuart Thomas, Trees in the Landscape. Flowering is from late spring and sporadically through the summer. The scientific name of blue oak honors the same David Douglas recognized in the name of Oregon’s state tree, the Douglas-fir. Successful public plantings in Seattle and elsewhere have shown this neat, rounded tree to be hardy and streetwise. Called bambooleaf because of the long, unlobed leaves, this oak will grow rapidly to 30-35 feet, perhaps more with time. The leathery leaves are gray-green above and make the tree incredibly drought tolerant once established. When drizzly skies blend streets and buildings into a wash of grays, the sparkle of living greenery overhead can be a powerful tonic. For example, as early as the 1870s the downtown park blocks were planted with stately elms native to the eastern U.S. Growing evergreen trees in zone 7 can include flowers and don’t have to be traditional narrow leaf specimens. Enjoy reading PacHort's informative articles and archives? For year-round texture and color in a bright spot, choose sun-loving evergreens. If you want more privacy or shade in your yard but don’t have a lot of space, small, fast-growing trees might be just what you need. Watering it in summer once it’s established can actually kill it. The southern magnolia grows well in zone 7. Two silverleaf oaks planted near the Visitors’ Center at Hoyt Arboretum already show how equally well the tree withstands cold and heat if given the sun they crave. The loquat (Eriobotrya japonica) appears now and then in Northwest gardens and may even yield its luscious fruit to those who give it a warm, sunny spot. Tall, thick, and dense evergreen shrubs on the other hand, also provide that sense of solitude, but do so with a leafy-whisper. The list of truly hardy eucalypts would have to include the snow gum (Eucalyptus niphophila), a sixty-foot tree with blue-gray leaves and smooth, ivory bark, the similar but larger E. pauciflora subsp. They await a bigger demand and assured sales, while designers and gardeners wait for the nurseries to offer, and guarantee, these plants. Among the cotoneasters are some pleasant small trees, perhaps the best and most common being Cotoneaster salicifolius, the willow cotoneaster. Bay laurel is capable of reaching 30 feet or more with a spread of 20 feet. Your support is critical to our continuing and future programs. Growing perhaps to sixty feet, it has bright green, long, pointed leaves that give the tree an assertive texture. Planting deciduous trees is to be expected in places where polar vortexes can send temperatures plummeting well below zero. This lifeless landscape makes winter more challenging – emotionally and environmentally – than it has to be. On young trees, bark is smooth and light gray, becoming fissured and darker with age. Far better behaved in cultivation is the canyon live oak. Their naturally compact form means little, if any, pruning is necessary to maintain their small stature ; Their evergreen nature means you’ll have color and texture in the garden year-round. Azara is best in a woodland edge. But tropical it is not; longstalk holly has endured temperatures well below zero in the Eastern states. One that has endured is M. grandiflora ‘Edith Bogue,’ which although originally from Florida withstands snow and ice better than the species and most cultivars. Introduced diseases have also taken a heavy toll of trees around the city. 1420 Beaumont Street include some of the hardiest broadleaved evergreen trees. You can count the percentage they represent on one hand. Those forests are home to an endangered primate, the Barbary macaque. Membership benefits apply to gifts of $50+: – Invitations to special members-only events The leathery leaves can be smooth, toothed or spiny like a holly. 2 A southern belle that endures northern winters. When rains do return in autumn, deciduous trees are starting to shut down. Lost in all of this is the richness and diversity that comes from a more cosmopolitan plant selection. © Copyright 2020 City of Portland, Oregon, USA, Bureaus & Offices of the City of Portland. Evergreen trees vary a lot in how much cold they will take. Birds find these seeds attractive. Only the strawberry tree (A. unedo), native to Ireland and the Mediterranean, is at all common in the Northwest. The evergreen dogwood (Cornus capitata) has had a spotty career in the Northwest, and few remain after our recent cold winters. Its large, corrugated leaves are reason enough to grow this surprisingly hardy subtropical, which can reach twenty feet or more. Even when Oregon natives were tried as street trees, the one most commonly experimented with was the deciduous bigleaf maple (Acer macrophyllum). (615) 693-7533, Camellia Forest Nursery 1 - A sweet new magnolia. There are needled evergreens and broadleaf evergreens, as well as trees that produce spring-time flowers or stunning fall color. While usually used as a shrub, this small-leaved plant can reach fifteen feet or more. Nothing is quite as pretty as a magnolia tree in bloom. (503) 363-5020, Wayside Gardens This is the most exciting of the lesser-known hollies and, judging from the fine specimens at the Washington Park Arboretum, it has great potential. Camellia pitardii, with beautiful pale rose flowers, and the pink-flowered hybrid between C. japonica and C. cuspidata make especially nice fifteen- to twenty-foot specimens in the Washington Park Arboretum in Seattle, where some cultivars of C. reticulata also are proving hardy. There is an evergreen tree for every growing zone, and 8 is no exception. Silverleaf will astonish with its fast growth, forming a densely branched tree to 40 feet or more in no time. Currently, evergreen trees make up the thinnest slice of the city’s street tree pie. A cousin of interior live oak, also widespread in California, is the blue oak (Quercus douglasii). Perhaps none makes a more attractive street tree than Quercus myrsinifolia. Still, a handful have survived, suggesting that selections from local trees might bring this beautiful plant into wider use here. Far rarer than when frequent fires set by Native Americans kept encroaching conifers at bay, madrone does not transplant easily and requires excellent drainage and a sunny location. Announcing the 2018 Park Tree Inventory Locations! Not signed up? Sounds nice, right? It may be rather shrubby unless top grafted. There are many benefits of planting small evergreen trees in your yard and garden. Deciduous trees lose their leaves each fall, while evergreen trees keep their foliage throughout the entire year. There are reports of the trees reseeding in England and elsewhere, so it might be best to avoid planting this tree if you live near a natural area. 990 Tetherpah Prominent, long-lived, and valuable, they set the look for the landscape helping to determine both the style and function of the outside space. The glossy privet (Ligustrum lucidum) also has been available for some time, but only lately have we begun to use it as a tree. (800) 845-1124. In short, broadleaved evergreen trees are a varied bunch with much to offer the landscaper and gardener. The trees can take a few years to fill in, but may never be quite as densely branched nor make as deep a shade as the southern magnolia. In Morocco, holly oak grows alongside Atlas cedar. 3-4 ft. (Zone 5) Broadleaf evergreen with glossy green leaves. The tree also produces olive-sized fruits, beloved by birds but less so by gardeners. Hodges, SC 29695 Very good in masses or used as hedging. In addition to the usual cultivars, some rarer species make handsome trees. Here then are ten excellent tall shrubs to consider when landscaping for privacy. Kate Karam | May 1, 2017. On Oregon's 159th birthday, celebrate our state tree the Douglas-fir! It was selected for being more evergreen than other sweetbays from the northern part of this tree’s range and for its upright growth to 35 feet. Evergreens for Sunny Sites. The potential of broadleaved evergreen trees has begun to attract more notice in the Northwest, but for those who have caught the spirit the problem remains one of availability. But a few of the best tall ones could be planted as small trees in semi-shade. However, as trees mature leaf spininess becomes less pronounced. 5, 6, and 7 - Oregon’s own broadleaved evergreens. Acorns are long and quite pointed at the tip. The recent string of record freezes has left doubts and confusion. On poorer soils, the glossy privet is dramatically improved in growth and color by an annual application of an all-purpose fertilizer the first few years. Two cultivars, ‘Camelliifolia’, with oval, nearly spineless leaves, and the recently popular ‘Wilsonii’, with rounded, evenly spined leaves, are usually available. are perhaps the most controversial trees on this list. Its lustrous leaves are narrower than the species, with only a hint of brown indumentum underneath. The southwestern U.S. and northern Mexico share a common flora rich in evergreen oaks. – Discounted admission to select partner events. We would do well to welcome more broadleaved evergreen trees. The boxleaf azara (Azara microphylla), from Chile, has perhaps the smallest leaves of any broadleaved tree. Trees from sturdy, preferably local, stock are hardy in most places, and the plant makes a bushy specimen fifteen to thirty feet tall. Under the usual dismal curbside conditions, glossy privet will grow slowly to fifteen to twenty-five feet; in decent garden soil it may be a little faster and reach twice the size. There are dozens of other hollies, little seen in nurseries, that deserve our attention. It has spectacularly sensual exfoliating bark that emerges with a snakelike olive color and ripens to a rich ocher. With narrow leaves and thin, often horizontal, branches, it makes a graceful multi-stemmed tree to fifteen feet or so. And where there is harshness to soften or ugliness to hide, we need the camouflage of foliage year round. Band-tailed pigeons gobble up the acorns whole, as will any resident squirrels. It rarely exceeds twenty feet. Though long available in the Northwest, the bay tree (Laurus nobilis) has shown enough ambivalence during our winters to have missed becoming really popular. Share Post . 1200 Weaver Road Learn about growing evergreen trees in zone 8 here. Although there is no fall color change, new leaves emerge an attractive silvery purplish red during the growing season. This tree has long been rated the hardiest in Europe, but Northwest specimens have shown disconcerting variability on that score. Other nearly hardy eucalypts doing well in some Northwest gardens are the spinning gum (E. perriniana), with silver-dollar juvenile leaves, and the cabbage gum (E. parvifolia), a bushy, small-leaved tree. But it doesn’t. They appear in late spring and sporadically through the summer. The cream-colored, cup-shaped flowers are lemon-scented. Edith Bogue grows at a moderate pace 30’ to possibly 40’ tall and 15’ to 20’ wide. This tree grows best in zones 5 through 8 and enjoys a humid climate. More tests and selection surely will lengthen the list of these colorful, fast-growing trees for the Northwest. Cultivars, some rarer species make handsome trees, relieved only by a small, one-seeded shiny black fruit by... 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