Best Source of Nitrogen for Your Plants

A reader asked “Am I able to substitute the amonium nitrate in the weekly feed with ammonium sulfate?” The answer that follows is important for everyone to know: Ammonium sulfate is only 21-0-0, as opposed to 34-0-0 for ammonium nitrate. In addition, 21-0-0 has substantial sulfur in it, which lowers soil pH. If you WANT …