Caption Pinyon pine trees at the conclusion of the Biosphere 2 experiment. The tree left was kept 4 degrees Celsius warmer and died weeks before the drought-stressed tree kept at ambient ...
The Colorado Pinyon pine (Pinus edulis) is a much smaller pine tree which makes it perfect for compact gardens. It's native to Southwestern U.S. and can be grown in USDA hardiness zones 6 through 8.
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