Answer: I'd recommend growing native plants. These are well adapted to the growing conditions in what we call the montane zone. The Montane zone consists of ponderosa pine, Douglas-fir, lodgepole pine, and aspen woodlands at elevations of 8,000 to 9,500 feet. You can also grow Picea engelmannii (Engelmann spruce), Pinus flexilis
(limber pine), Populus angustifolia (narrowleaf cottonwood) which is probably the fastest growing of all.
A shrub with excellent fall color is Quercus gambelii (Gambel oak, scrub oak) a small tree to large shrub, which grows best on well-drained soils and is often thicket-forming; produces shades of red, orange, yellow and brown in fall; acorns provide excellent wildlife food.
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