Fertilizing lawns in the fall is a highly recommended lawn care practice. Winterizer fertilizers are used in the fall (late-season) because they provide a number of benefits to lawns:
better fall and winter color, earlier green-up of the lawn in spring, better root growth, and increased grass density. To be effective, the fertilizer should be applied when the soil is moist, while the lawn is still green and before the ground freezes. Winterizer fertilizer may be applied to Kentucky bluegrass, ryegrass and tall fescue lawns at a rate of one pound of nitrogen per 1000 square feet of lawn during October or early November. Do not fertilize Buffalograss, Blue Grama or Bermuda grass in the fall.