Moss kill is rapid and iron also stimulates a "green-up" of turf. A complete fertilizer that includes iron will stimulate healthy growth and kill moss at the same time. ... Salts and chelated iron products applied as liquids are generally effective on moss at 0.5 - 1.0 lb.

How much iron does it take to kill moss?

Mix the liquid iron at 2 oz per quart of water, 8 oz per gallon. Using a pump or trigger sprayer, wet the moss well with the iron solution, being careful to avoid spraying the grass. Test a small area first–the moss should turn blackish brown within 24 hours.

What type of iron kills moss?

Moss control products based on iron and naturally occurring iron substances, such as ferrous sulfate, are highly effective at killing lawn moss by drawing out moisture so mosses dry up, turn black and die.