Ablang wrote:

Is this basically the same fertilizer that people use on their
lawns, or in addition to regular fertilizer? Is this the product that
people use to keep their lawn green every 2-3 months? Or does regular
lawn fertilizer do the job?

Ammonium sulfate is acidic and used primarily where the soils are
alkaline (e.g., in my own garden).

It will give a lawn a quick green-up but can burn the lawn if not
applied carefully. If the grass blades are not dry or if the
ammonium sulfate is not immediately rinsed into the soil, you can
kill the foliage. Also, if too much is applied, you can kill the
roots.

I use it primarily on shrubs and perennials. My roses and gardenia
love it. For my lawn, I use an off-brand or generic lawn food,
which dissolves more slowly and is less likely to burn.

--
David E. Ross
Climate: California Mediterranean
Sunset Zone: 21 -- interior Santa Monica Mountains with some ocean
influence (USDA 10a, very close to Sunset Zone 19)
Gardening pages at URL:http://www.rossde.com/garden/