A herbicidal composition is provided, the composition comprising: (A) the crystalline modification I of 2-(4-mesyl-2-nitrobenzoyl)cyclohexane-1,3-dione (mesotrione); and (B) the crystalline modification I of 1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea (rimsulfuron). A method of controlling plant growth at a locus comprises applying to the locus herbicidally effective amounts of both (A) the crystalline modification I of 2-(4-mesyl-2-nitrobenzoyl)cyclohexane-1,3-dione (mesotrione); and (B) the crystalline modification I of 1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea (rimsulfuron).