Planting a landscape in Idaho can be difficult due to the hardiness zones of the region. Idaho incorporates hardiness zones 2 through 7, from quite cold to very mild. Evergreen trees will give the gardener or homeowner nice foliage year round, foliage that will not drop between growing seasons. For Idaho, this can mean a landscape that appears alive and vibrant even in the cold seasons.
Chinese juniper (Juniperus chinensis) is an evergreen shrub or tree from the cypress family. It will get 50 to 70 feet high and 20 feet wide. Leaves are needles when young and diamond-shaped when older. Cones are fleshy and ½ inch wide. Plant a Chinese juniper in any soil in full sun or dappled shade. Propagate via cuttings in USDA hardiness zones of 3 through 9 (very northern Idaho may have issues).
Rocky Mountain Juniper
Juniperus scopulorum (commonly known as the Rocky Mountain juniper or western red cedar) is also an evergreen shrub or tree from the cypress family. It gets 50 feet high with reddish bark. Leaves are needle-like at the beginning. Bright blue berry-like fruits are 1/3 inch wide. Plant a Rocky Mountain juniper in any well drained soil in shade or full sun. Propagate via seed, cuttings, or grafting in USDA hardiness zones of 4 through 7 (first two Idaho hardiness zones may have serious issues).
Abies concolor from the pine family, the white fir or Colorado fir, is an evergreen tree. It has the potential of getting 100 feet tall, but is usually 40 to 60 feet high. Leaves are needles 2 inches long. Cones are purple-green and 5 inches long. Plant a white fir in light shade or full sun in any soil. Propagate via cuttings or seed in USDA hardiness zones of 4 through 7 (the first two Idaho hardiness zones will have serious difficulty).