Feeds & treats 400 square metres. This product will help develop a thick green lawn & will effectively control moss. One application will result in a greener lawn within one week, & moss will usually die within two weeks. Because there is a steady supply of nutrients to your lawn over an eight week period, your lawn will stay thicker & greener for months. Apply during Spring or Autumn when the moss is actively growing, or use as part of your annual maintenance programme. For best results, apply when the soil is moist & tall grass has been cut back to expose the growing moss. The grass should not be cut for 4 days before or after treatment.