In addition, the plant has a moderate growth rate and can get 4 to 6 inches (10-15 cm.) high with a 2 foot (.6 m.) spread. Creeping Phlox Planting Instructions. Learning how to plant and care for creeping phlox is quite simple. The plant has an easy going nature and thrives in a variety of conditions. Almost any soil is suitable for growing creeping phlox as long as it is in full sun to partial shade.

Like other ground covers,creeping phlox takes a few years to reach maturity -- about two years on average, according to the North Carolina State University Cooperative Extension. This means it grows an average of about an inch per month. The rate of growth depends on a wide variety of conditions, however, including cultural ones.