A herbicide composition includes a fenoxaprop ester and a weak acid buffer system. The buffer system maintains the herbicidal composition at a pH in the range of 4 to 8. In one non-limiting embodiment, the fenoxaprop ester is fenoxaprop ethyl. The buffer system can include an amine-containing material, such as a tertiary amine. The herbicide composition can include other herbicides, such as weak acid herbicides, for example pyrasulfotole, bromoxynil, and/or bromoxynil esters and can include one or more safeners.