Multicolor Double Phlox - 9 Bare Roots These phlox plants feature a double bloom and can grow up to 40 inches tall. This colorful mixed set includes red, pink, white and purple and are guaranteed to stand out in any garden, landscape or in the back of a perennial border. This stunning Phlox collection even attracts butterflies and hummingbirds. A must have for any garden these are ideal for planting zones 4 through 8 and bloom in mid summer through the fall. They require full sun to partial shade and ship as a bare root plant.