At 6300 feet above sea level, it may seem impossible to garden or grow anything worthwhile. Gardeners at this altitude must contend with a shorter growing season, hungry wildlife, and dramatic temperature changes from day to night during the start and end of your growing season. Once you understand these variations for high-altitude gardening, however, you will be able to grow some spectacular flowering plants.
Early to mid-summer blooming perennials are ideal for landscapes at the 6300 foot altitude, because their blossoms will not be affected by an early frost. Coneflowers, daisies, pincushion, penstemon, bleeding heart, asters, and coral bells are popular high-altitude perennials.
Flowering perennials that start with a bulb are wonderful for a garden at 6300 feet elevation. Plant in the early fall, before the ground freezes. Spring blooming bulbs like crocus, tulips, daffodils, hyacinth, and iris thrive at colder, higher altitudes. In the spring, as soon as you can work the soil, plant early to mid-summer blooming bulbs like lilies and oriental poppies.
Wildflowers and Annuals
Wildflowers and annuals grown in higher altitudes are easy to care for and usually will reseed to reappear the following year. Native species are tolerant of the conditions of your particular area, but you are not limited to natives in a high-altitude garden. Cornflowers, African daisies, coreopsis, cosmos, pansies, Johnny jump-ups, alyssum, sweet William, California poppies, red poppies, zinnias, lupine, and black eye Susan are common annual plants for higher altitude landscapes.
Bushes and Trees
There is an abundance of flowering bushes and trees for you to select for your high-altitude landscape. Honeysuckle, peonies, lilac, forsythia, snow berry, spirea, butterfly bush and dogwood are a few of the favorite bushes that thrive in your high-altitude yard.
Flowering trees like crab apple, choke cherry, and red bud trees will be full of colorful blossoms in the spring. Fruit trees like plum, apple, pear, cherry and peach benefit from the cooler environment at 6300 feet elevation, blooming magnificently in the spring and rewarding you with a bounty of fruit in the summer and early fall.