12-0-18. 6kg bag. Prepare your lawn for the long, cold winter with C-I-L® Fall Lawn Food 12-0-18. This lawn fertilizer is enriched with potash and it will improve resistance to cold winter conditions, drought and disease. This fall fertilizer also helps to thicken lawns and to reduce weeds. 30% of the nitrogen is slow release to give your lawn a continued green look while reducing growth surge, for less mowing through the fall season.