The Jonathan Green four bag annual New American Lawn Alkaline Soil Program greens up the lawn and gently feeds it all season long. Lawn care research has concluded that lawns respond best when fed four times a year in the early spring, late spring, summer and fall. This seeding program is used in the western United States where soils generally have a high pH. Our lawn program is specially formulated to lower soil pH and to kill crabgrass, dandelions, chickweed, clover and over 250 other weeds. Our system gets to the root of lawn care problems, the soil! When used together these products balance the lawn's pH and loosen hard, compacted soil, all while spurring soil microbes into action. These microbes assist air, water and nutrients in moving deep into the soil increasing the root mass and drought tolerance of the lawn.