PURPOSE: An additive composition for lawn culturing is provided to prevent potassium deficiency of lawn grass and toenhance nutrient holding capacity of the lawn grass clay by including natural zeolite and zeolite in which potassium is dipped. CONSTITUTION: An additive composition for lawn culturing includes zeolite which potassium is dipped and natural zeolite in a ratio of 1:1-1:10. 10-50cmol+/kg of potassium is dipped in the zeolite. A positive ion exchange capacity of the natural zeolite is 50-150meq/100g. The zeolite which potassium is dipped and the natural zeolite have particle sizes of 0.5-2mm. The additive composition for lawn culturing contains silica. 1-30 weight% of additive composition for lawn culturing is included based on total weight of lawn grass soil.
