- 1). Mix 2 ounces of ferrous sulfate in 3 gallons of water inside a sprayer, such as a hose-end applicator. This amount covers 1,000 square feet of lawn.
- 2). Spray the ferrous sulfate solution on the centipedegrass evenly while walking at a normal pace. Make this first iron application between February and May.
- 3). Repeat Steps 1 and 2 sometime between June and August. Allow a three-month interval between the two iron-supplement applications.
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