No The Bonide MoleMax RTS will not harm your lawn or flowers, it will only coat plants that it is applied to.
Bonide MoleMax RTS repels moles, voles, skunks, armadillos, rabbits, and gophers using castor oil, an all natural solution. It does not kill anything.
The MoleMax RTS product label recommends that you apply to the entire area. If you have a large area to treat, it is best to treat in sections, beginning at one point and working toward a desired "exit location."
Bonide MoleMax RTS is 100% castrol oil, but it is not OMRI certified.