QuestionsHow to growLawnsFeedingLawn fertilizer 0 Vote Up Vote Down Geraldine Butterworth asked 9 years ago Can I use gouldings 7-6-17 as fertilizer on my lawn? what rate do I use ? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 2 years ago While 7-6-17 will boost grass growth, it is the wrong balance for grass. A grass feed should be 25-2-5, or thereabouts. The first figure N is nitrogen, the main nutrient needed by grass. 15 to 30g per square metre is plenty, with rain on the way.