Often, only parts of the lawn are dry. This may be due to uneven watering. Fertilize Fertilize azaleas, camellias, gardenias and citrus with acid food. Follow up one week later with liquid iron. Fertilize lawns with a high nitrogen fertilizer.
Ammonium sulfate is inexpensive and works well.
Following package directions will apply one pound of nitrogen per 1000 square feet of lawn. Use weed and feed products only for severe infestations of weeds. Use spot sprays if the infestation is minor. Do not use a broadleaf weed killer that contains dicamba if there are trees in the lawn. Tree roots will absorb dicamba, and leaves will be damaged.