Ferrous Sulfate Heptahydrate - FeSO47H2O - 20% Iron - Very Soluble - 5 Pounds

It is very effective in killing moss. Mixed it with damp sand and applied with a hand spreader. Worked and killed the moss after 5 days. I highly recommend this product and with the application trick for killing moss

I've used ferrous sulfate for years in my wood garden beds and barn building projects. It is one of the only truly non-toxic methods for protecting against bug infestation and mold and is a fraction of the price of some of the other "treatments" out there. I can grow vegetables right up against the boards and not worry about toxins leaching into them like most other wood protectors. Do a search on Google and you will find more about it. I mix about 3-4 cups in 5 gallons of Water and either dunk spray or roll on to my pine boards. The more you add the darker gray the wood gets but it can take hours to weeks to darken fully so don't overdue it at first.An added benefit is that it grays the wood so it looks like old barnwood. I use this benefit by mixing it with iron oxide (which is just powdered rust and available on Amazon from the same supplier) and then dunk it, roll it, or spray it on my pine lumber. The ferrous sulfate darkens the wood and the iron oxide soaks in and gives it a permanent reddish stain so my white pine boards all look like aged Redwood.And, in my opinion, the best thing is that you have both protected the wood from mold and infestations but also the rust stain never (ever) lightens or has to get redone. Which is great if you've ever had to repaint or restain a large outdoor project. Let's face it, rust is rust, it stains concrete (which I also use it for) and it'll do the same thing for wood... permanently.Hope this was helpful

My lawn was struggling due to heat and lack of nutrients in soil, I ordered this product and in just two weeks my lawn is thriving again, that is just one application. I am very pleased to see the results.

Results from first use appear good. Moss in lawn has turned black but grass is fine. Only issue is there are no mixing instructions on the package for what amount pf product to use for any application. Fortunately a google search for Ferrous Sulfate Heptahydrate mixing instructions found places that gave a product weight to water volume amounts and that seems to have worked.

I liked the fact the product worked very well on moss. My moss was killed almost instantly after spraying it on. I works much better than Moss Out that you attach to your garden hose. One suggestion to the company though, the package of product does not include any instructions on how to use it, when, or how much. This could easily have been placed on the package for the customer and should be done.