Are you researching how often to mow St. Augustine grass? The general recommendation for lawn care is to mow once per week. There will be a different growth rate for each lawn, so stating any one strict figure may not be accurate. However, you do want to stay ahead of mowing since the runners of St. Augustine grass will naturally spread out into the adjacent areas if they are not contained. By consistently mowing the lawn, you ensure that the energy that is flowing through the grass is invested in repair of the leaves that the mowing process damaged.