![]() Table 1 lists trees for mountain areas Table 2 lists shrubs for mountain areas. Some fencing or protection against elk, deer and rodents may also be needed. ![]() Wrap from the base up to the first or second main branch and tie or tape it there. Wrap trunks of young, thin-barked deciduous trees with a commercial tree wrap in the fall to prevent sunscald. In general, snow accumulation is best around a tree or shrub if the fence is placed on the upwind side of the tree or shrub. Encourage snow to drift over the root zone of young plants by using temporary snow fences in appropriate locations. It allows root growth to occur even during some periods of the winter. Do not mix trees and shrubs with widely different water needs. Plant species with similar water needs in the same general area. Tables 1 and 2 indicate the relative moisture needs of trees and shrubs for mountain areas. Refer to Fact Sheet # 7.235 Choosing a Soil Amendment. ![]() In areas where multiple shrubs or trees will be planted, it is best to amend the entire area. Amending the excavated soil 10 to 20 percent by volume with organic material may be beneficial. Dig a saucer-shaped hold two to three times as wide as a root ball but no deeper than the depth of root ball. Most shrubs in pots are grown in a soilless media. Rodent damage, avoid applying mulch directly in contact with tree trunks and woody stems. To reduce the potential for insect, disease and Use organic mulches, such as pine needles, shredded bark or wood chips, around the plant to delay freezing of the soil in the fall and to prolong root development. Mulching 3 to 4 inches deep over the root area also helps to retain soil moisture. Shrubs grown in pots can be planted anytime spring through late summer (mid- August to early September, depending on elevation) in order to allow some root establishment before the ground freezes. Bring them outdoors for longer periods of time each day. Acclimate plants by gradually exposing them to mountain conditions overĪ period of several days or weeks. New growth may not be hardened enough to withstand the current conditions at higher elevation at planting time. Nursery stock grown below 6000 feet leafs out earlier. Leafed-out plants should be planted after the last frost, up until mid-August. In mountain areas, the best time to plant trees and shrubs is as early in spring as the soil can be worked, provided that the planting stock is fully dormant. Stock originating from southern and Pacific Coast sources may be less hardy even though it is sold under the same name as stock from northern or higher elevation nurseries. When purchasing trees from a nursery, attempt to find out where the stock was grown. Some shrubs may survive at a given elevation but may not produce flowers or fruit due to a short frost-free period. Exposure to wind can also determine whether a tree or shrub will survive at higher elevations. warm, south-facing microclimate may allow trees and shrubs to perform better at higher altitudes than indicated. Some plants perform better in the shade, others in full sun. The following tables include a notation on moisture and drainage conditions for best performance and survival. Cultural factors to take into consideration include: These lists do not take into consideration the different microclimates (such as north, south, east and west facing slopes) and soil conditions possible at a Use the list of shrubs and trees from the following tables as a guide to select those most adaptable to local elevation and exposure. Tables 1 and 2 include non-native trees and shrubs hardy for various elevations above 6,500 feet. The dividing line for a wide variety of trees appears to be at or near 7,500 ft. For recommendations for lower altitudes, see fact sheets 7.418, Small Deciduous Trees 7.419, Large Deciduous Trees 7.414, Evergreen Shrubs and 7.403, Evergreen Trees. For native trees and shrubs for Colorado landscapes please refer to fact sheets 7.421 and 7.422. This fact sheet discusses non-native trees and shrubs for mountain areas above 6,500 feet.
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