In early spring apply Organic Weed Control and MAG-I-CAL. In the late spring and early summer apply Natural Beauty Lawn Fertilizer. Late summer and early fall apply Organic Weed Control. In the late fall apply Organic Lawn Fertilizer. For no-phosphorus areas substitute Natural Beauty for Organic Lawn Fertilizer. Do not apply grass seed for 60 to 90 days after spreading Organic Weed Control.