Iron Sulfate, granular Mg & Mn plus Ammonium Sulfate will really turn a lawn dark green. BUT IT ALSO STAINS ANYTHING IT TOUCHES. Plus as Ted said it is hard on Pumps, hoses, and Guns etc. Granular/powdered Fe, Mg & Mn are metals that act like a sand blaster on the inside of your pump. Unless you have your spray technic down to a perfect science, Over spray can cost you the Farm.
My point being, It is a lot safer to pay a little extra and use NON STAINING products of FE, Mg & Mn.
BTW Feature 6-0-0 is low staining/non staining.
"TG doesn't give a rats ass about being "Responsible" as long as sales/production quotas are met. That's it in a nutshell. A recipe for disaster IMO." Ted Putnam 2/28/14
You can lead a Donkey to water but you can't make the Jackass Drink
"As Americans you have the right to be stupid." John Kerry
"Life is tough, but it's tougher when you're stupid.” John Wayne.