Abstract: The combination of 2-chloroethylphosphonic acid and one or more chemical inhibitors of plant growth such as 3-trichloromethylsulfonamido-p-acetotoluidide or a water soluble salt thereof alters the morphology and growth pattern of non-tropical turf grasses when applied thereto, resulting in healthy turf grasses which exhibit predominant lateral growth and suppressed vertical growth. The coordinating combination of the two growth regulating agents is most effective when applied as an aqueous mixture containing a small amount of surfactant.The growth regulating agent can be applied as an aqueous spray or foam, or as a dry application. They can also be included in a complete fertilizer system which can be applied in liquid or dry form.