Ammonium nonanoate is a multi-purpose herbicide that’s been used to suppress weeds, underbrush and mosses since it was approved for use in 2006. It’s a naturally-occurring fatty acid found in a variety of plants and animals. It’s referred to as a soap-salt, as certain fatty acids are also used to make household soap.
Ammonium nonanoate only affects the plant tissue with which it comes in contact. That is, it does not move to other areas of the plant, so good spray coverage of the entire weed is very important.
Once ammonium nonanoate contacts plant tissue, it disrupts plant cell membranes and reduces pH, causing plant cell death/desiccation within minutes of application. It can be used on its own, but it’s especially powerful when mixed with other herbicides intended to prevent weed regrowth.
Ortho® GroundClear® Weed & Grass Killer