Does commercial fertilizer (e.g. 27-2.5- 5) when used on lawns produce faster and coarser growth than that specially compounded for lawns which, generally, seems to have a much lower nitrogen content? Also, is the commercial variety depleted more quickly in the soil than the regular lawn type?
If they are used, they should be used in small amounts, 15 per square metre at a time. And they are much cheaper.