Yarrows are among the best perennials for planting in hot, dry and sunny locations, providing good color throughout the summer months. Colorado Mix produces showy clusters of flowers in shades of blood red, cerise, cream, yellow and white.  Plants are upright and sturdy, and the blooms persist through the summer.  The lacy, cool green foliage sets off a long-running display that can carry a border through the summer on its own. Yarrows are inclined to spread, and are easily divided in fall or early spring. Trim back hard after the first flush of bloom to maintain a compact habit.