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. Its perfect cone shape displays dense green soft-to-the-touch needles. Most varieties grow up to 40 feet tall, but some dwarf varieties are shorter. Prescott, AZ 86305. 10 Hard-to-Kill Evergreen Trees. (Styrax japonicus) 20-30' White Flowers (May/June) that hang down, pest free. But landscapers also value Ginkgo biloba (commonly called "maidenhair tree") for the exquisite fan-shape of its leaves.. Excellent when planted as windbreaks or to provide thick privacy, and hardy enough for harsh commercial settings and investment properties. Many mistake it for a juniper in appearance, but this blue evergreen forms a golfball sized cone instead of juniper berries, making it less allergy inducing than a native juniper. Thank you, Not an expert on your area so please check the USDA recommended zones. Drainage around the roots is vital and proper irrigation techniques are critical. ... We were planning to plant some Norway spruce trees to help screen our house from the neighbors, but it appears that Norway spruce can also get needle cast problems. Thus, there are lots of money to be saved – and even more to lose, if nothing is done. more info. 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. Your email address will not be published. Forget spraying harsh chemicals...learn more about our Disease Resistant Plants & Trees today! This very stately pine is so soft that most homeowners literally hug these trees! is excellent as a container plant or miniature Christmas tree. Here is a list of our favorite trees based on size, color, leaf characteristics and insect/disease resistance. Blue spruce is very susceptible, as are black, Engelmann, red, Sitka, and white spruces. Canker diseases are caused by fungi that infect branches or the main stem of trees. Looking for the perfect tree to fill out an open space in your landscape? Since it is difficult to target the fungus directly, rot resistant spruce trees appear to be the ideal counter measure. The most noteworthy aesthetic trait of this ancient drought-tolerant tree is its fall color. 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. Norway spruce (P. abies) is highly resistant to this disease. The average size tree that stands head high costs about $100, and includes the warranty, labor, and all the material to plant it right. Evergreen tree resistant from needlecast disease . BIG CAUTION – Evergreens are field grown until reaching mature size. There are links at the end of this article for mountain planting and for safe watering. I really can't think of any pine or spruce trees that are disease resistant. more info, (Cryptomeria japonica 'Elegans') 20-35' Soft delicate foliage, bronze fall color. Rhizosphaera needle cast is a common foliar disease of spruces and other conifers caused by the fungus Rhizosphaera kalkhoffii. The resulting high humidity favors development of diseases. Blue and Engelmann spruce are highly susceptible. Spruces (Picea spp.) Asked October 3, 2019, 10:53 AM EDT. It’s difficult to explain but this process makes a big difference. Canker diseases. Chrysomyxa weirii: Destroy heavily infected trees. (Thuja plicata) 60-90� Resistant to root rot, likes moist soils. 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. 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. more info. (Oxydendrum arboreum) 40' Wonderful fall color, bell shaped white flowers in spring. This is why its good to know the origin of the trees you plan to buy. The color of the needles on spruce trees varies from light … When acquiring evergreen trees you should make the time to hand pick the specimens going into your yard. Carolina Silverbell. Piñon  Pine – A local native that is exceptionally hardy and drought tolerant, it is slow growing with a broad, rounded crown. Deodar Cedar – This fast grower has a central leader with soft branches that sway gracefully in the wind. Tip blights are most common on pines, especially Austrian pines, but can also occur on spruces. 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. It makes a most effective windbreak or privacy screen. This column is about the right plants in the right places. New growth is blue to green with clusters of pinecones as the tree matures. Perfect for all natural landscapes it makes an attractive grouping on hillsides or berms with low-growing perennials. Plant disease resistant cultivars and varieties. Considered drought hardy, this tree prefers dry, windy conditions. Other hosts include white, black, Engelmann, Sitka, and Serbian spruce; Austrian, mugo, Eastern white, and Japanese red and black pine, as well as Douglas-fir and Siberian fir. 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 … 3. Norway spruce trees that are preinoculated at low densities with the bark beetle‐associated blue‐stain fungus Ceratocystis polonica become much more resistant towards subsequent massive infection with the same fungus (Krokene et al., 1999). Concolor fir (Abies concolor) and some white spruce are good large tree alternatives with blue-green foliage to Colorado spruce. When trees are planted too close together, air circulation around the tree is greatly reduced. The best thing to do is to plant trees on the correct site and provide enough space for their mature size. Younger trees have a pyramidal shape that opens up as they mature. We then field dig, wrap the roots in burlap, transplant it into a grower’s container, and continue to root it for another season. Some locations have an additional infection period in September and October. 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. Here are the links on how to plant and appropriately irrigate evergreen trees. 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. Tip blights are fungal diseases that typically cause dieback to new, emerging shoots (Photo 4). Arizona Cypress – This tree is a real celebrity in the local garden world. Planting & Delivery Service – Evergreens are unusually heavy, bulky, and can inflict bodily damage while being installed in a landscape. This list of hardy trees will survive with just one caveat: Each is prone to a slow death if overwatered. Written by Al Koeppel. Edible seeds from the cones are considered a delicacy, commonly known as pine nuts. The lowland deserts have a significant influence on mountain landscapes, and some of their desert evergreens will grow up here, but not many. Whereas the ponderosa loses all its lower branches as it matures, the Austrian’s rich green needles seem to flow right to the ground for a balanced appearance. Norway spruce is relatively resistant. So consider the cost of having your nursery plant it for you as money well spent. It’s very unusual and distinctive shape is unique to mountain landscapes. Required fields are marked *, 1815 W. Iron Springs Road Of late there have been some rumors, misconceptions, and downright lies presented to mountain gardeners, and you should be aware of them. Austrian Pine – This long-needled evergreen often is mistaken for a young ponderosa pine although it is far more graceful.