Best high-altitude cultivars

The Pleasant Avenue Nursery in Buena Vista has been specializing in the growing and testing of native and apt species for high-altitude gardening since 1972, changing its focus over the years from mined-land reclamation projects to the lighter-hearted realm of mountain gardening and landscaping. But Pleasant Avenue has became even more of a growth industry this year, starting off the spring with a big retail expansion offering nearly 3,000 square feet of high-country flora. If you choose to live the high life, your plants will have to, too; here's a good place to find the right stuff.