ALL RIGHTS RESERVED. The fight against rhizosphaera needle cast. Here is a list of the top 10 evergreen trees that stand up to mountain winds, winter cold, and resist the naturally occurring insects and diseases found at higher elevations. Until next week, I’ll be helping local gardeners looking for evergreen trees here at Watters. But landscapers also value Ginkgo biloba (commonly called "maidenhair tree") for the exquisite fan-shape of its leaves.. Already, approximately one spruce tree in six is rotted to some extent, and the costs are estimated to 2 million SEK each day. Tip blights are fungal diseases that typically cause dieback to new, emerging shoots (Photo 4). Vanderwolf Pine – Take a close look and you will see that the top of each needle is blue with a green underside. (Thuja plicata) 60-90� Resistant to root rot, likes moist soils. The best thing to do is to plant trees on the correct site and provide enough space for their mature size. Its perfect cone shape displays dense green soft-to-the-touch needles. There are links at the end of this article for mountain planting and for safe watering. Deodar Cedar – This fast grower has a central leader with soft branches that sway gracefully in the wind. Of late there have been some rumors, misconceptions, and downright lies presented to mountain gardeners, and you should be aware of them. Colorado Spruce – When customers don’t know the name of this tree they just refer to it as “The one that looks like a Christmas tree.” The very thick branches swoop horizontally forming a perfect broad pyramid. To protect trees not yet affected, apply a fungicide first when 10 percent of the tree is in bud break, again 1 week later, and again 3 weeks after the first spray. Edible seeds from the cones are considered a delicacy, commonly known as pine nuts. This list of hardy trees will survive with just one caveat: Each is prone to a slow death if overwatered. 3. It is the hardiest of the ornamental pines without the bug issues that plague many native pines. Our Service Area includes: Portland, Vancouver, Beaverton, Hillsboro, Tigard, Wilsonville, Tualatin, Lake Oswego, West Linn, Oregon City, Gladstone, Milwaukie, Gresham and Happy Valley. 10 Hard-to-Kill Evergreen Trees. When acquiring evergreen trees you should make the time to hand pick the specimens going into your yard. Disease and insect problems. Perfect for all natural landscapes it makes an attractive grouping on hillsides or berms with low-growing perennials. Planting & Delivery Service – Evergreens are unusually heavy, bulky, and can inflict bodily damage while being installed in a landscape. David Beaulieu. Concolor fir (Abies concolor) and some white spruce are good large tree alternatives with blue-green foliage to Colorado spruce. Norway Spruce – Spruces grow so well at local elevations that most will thrive in local landscapes. more info, (Cornus Kousa) 20-30' Anthracnose resistant white flowers in spring followed by raspberry like fruit. Rhizosphaera needlecast more info. is excellent as a container plant or miniature Christmas tree. Do the hard work of shopping to learn what others are saying about evergreen trees bought from the company you are considering to supply your tree. Apply a fungicide when new shoots are 1½ inches long and again 3 weeks later to protect young needles from infections that occur in May through June. are large trees with ridged evergreen needles. It’s difficult to explain but this process makes a big difference. Dwarf Alberta Spruce – This slowest growing of the evergreens is the easiest to maintain. Of course, the larger the tree, the more work it is to install so the more it costs to plant. Considered drought hardy, this tree prefers dry, windy conditions. By: Al Koeppel, Kretz Lumber Company, with insight from Linda Williams, Wisconsin Department of Natural Resources. Drainage around the roots is vital and proper irrigation techniques are critical. Piñon Pine – A local native that is exceptionally hardy and drought tolerant, it is slow growing with a broad, rounded crown. Con – Watch for spider mite webs that can form in June. Not only do we here at Watters hand pick our trees from trusted sources, but we also walk the field looking for signs of a tree that had been root pruned through its maturity. A broad pyramidal shape with exceptional blue needles that present a consistent blue color. (Halesia tetraptera) 20-35’ Bell shaped flower, good understory tree, yellow hue … Considered drought hardy, this tree prefers dry, windy conditions. COPYRIGHT ©2020, WATTERS GARDEN CENTER. Here is a list of our favorite trees based on size, color, leaf characteristics and insect/disease resistance. Fat Albert Blue Spruce – Sporting a shape similar to that of the Colorado Spruce, Fat Albert doesn’t grow as tall, so it won’t “take over” more than its allotted space. This column is about the right plants in the right places. There are conifers that are more resistant to Rhizosphaera, and include white spruce (P. glauca) and its variant Black Hills spruce, both of which are intermediate in resistance. They are being impacted by a fungal disease which goes by the name of Rhizosphaera needle … A dense tree that easily blocks out wind and neighbors, the Norway is ideal for use as a privacy barrier, windscreen, or even a traditional showpiece. Black Hills Spruce – With the deepest green of any evergreen and a density that light dares not shine through, this spruce’s perfect cone-shaped symmetry stands out in any landscape. (Halesia tetraptera) 20-35� Bell shaped flower, good understory tree, yellow hue in fall. Although the tree looks delicious, neither javelina nor deer like to nibble on this evergreen. more info, (Cryptomeria japonica 'Elegans') 20-35' Soft delicate foliage, bronze fall color. Evergreen tree resistant from needlecast disease . Plant disease resistant cultivars and varieties. more info, (Parrotia persica) 20-30' Brown exfoliating bark, showy crimson stamens in early spring. Grows faster than other spruces, but with a bright Irish green needle. Thus, there are lots of money to be saved – and even more to lose, if nothing is done. Looking for the perfect tree to fill out an open space in your landscape? Asked October 3, 2019, 10:53 AM EDT.
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