It's common to have a thin lawn at the end of summer just before fall starts. If your lawn has thinned out then this 3-week fix may be right up your alley. You can get this job done in a single day and have the best-looking lawn on the block in no time.
You can pick up basic ammonium sulfate in just about any store locally for a great price and brand hardly matters.
If you'd like to buy online though then the Yard Mastery company has a great hybrid product that combines roughly half ammonium sulphate and half naturally sourced fertilizer called Soil Fit. It will help your lawn perform even better than adding Nitrogen alone because of added micronutrients and biostimulants.
