These are just a few of the aquatic plants that grow well in the Rocky Mountain Region because of our abundant sunshine and thin air. Many water plants are hardy in Colorado, water lilies, water iris, Louisianna Iris, horse tail rush, lizards tail and hornwort, just to name a few. When buying water plants be sure to ask if they are hardy to your area. Try to find a nursery that is knowledgeable about water gardening.