AI: Ammonium Nonanoate. OMRI Listed. AXXE Broad Spectrum Herbicide is a non-selective, organic certified, post emergence herbicide labeled for use on many sites including greenhouses, nurseries, and landscapes. AXXE Broad Spectrum Herbicide controls grases and broadleaf weeds, mosses, liverworts and lichens. AXXE provides a rapid burn down of weeds within hours and then biodegrades quickly, living no harmful residue behind. AXXE Broad Spectrum Herbicide does not volatilize or migrate through soil and is safe to use in all areas of production, both inside and outside.