These Phlox are a creeping variety sometimes called Moss Phlox (Phlox subulata) They like the soil to be a bit damp. You can get three, five or six small plants 5 cm diameter (sometimes called plugs) selected at random from the best stock available in the nursery at the time of your order. Just dig a small hole, put the little root-ball in and cover with soil, then firm down and water well.