Garden Phlox grows during the summer months. The other type of Phlox is Creeping Phlox, which is a springtime ground covering perennial.
They will begin to grow in the middle of summer, and can last through to the fall months. This variety is noticeably different from the creeping kind because it is taller. Creeping Phlox grows low to the ground, while Garden Phlox grows 3-5 feet tall.