Dilute pure malt extract with 50 percent water, stirring the solution thoroughly. Homemade or store-bought malt extract can be used, as long as it is pure and unhopped. Malt extracts sold for fertilizing purposes may already be diluted with 50 percent of water. In this case, no additional water is needed at this point.
Combine one part of malt extract, either pre-diluted or self-diluted, with five parts additional water in a sprayer.
Spray the lawn or sandy soil with a consistent coating of the malt extract dilution. Use approximately 1 1/4 oz. of diluted solution per square yard.