I bought fine powder ferrous sulfate. I assume that it's the same, and that I can use it in a 25-gallon electric pump sprayer like the one on the back of a four-wheeler. Do I spray when it's sunny out with rain in the near forecast, or does it matter?
I usually spray when it's sunny or overcast, and not windy. It's probably not a good idea to spray when rain is imminent to allow a few hours for the solution to be absorbed by the moss.
Updated on March 18, 2018
By Eugene Brennan