>>>I’m trying to see what crops can be grown at 7200’.
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Garden location - positioning can make a big difference. Row covers are cheap and will give 3-5º protection. These two things will expand the types you can grow.
Here are a couple of articles you may find of interest:
http://www.motherearthnews.com/Organic-Gardening/1975-05-01/High-Altitude-Gardening.aspx
http://gardening.coloradohighaltitude.com/VegetableGardening/index.php
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Awesome articles - thanks!