Rocky Mountains west to Nevada, east to Oklahoma & the Dakotas. Upright to weeping, elegant 20 - 30 ft. tree with blue foliage, edible berries for us & other wildlife, & wood that lasts forever as posts & is fragrant in the fire. Plant outside for nature to follow its course; germination is improved with 3 months in warm, just damp soil followed by 3 months cold stratification. Zone 3