[Lakegeezer]

When buying fertilizer, there are three numbers on the bag that tell you how much of the good stuff is in it. Think NPK - Nitrogen, Phosphorus, Potassium. 10 5 10 means 10 parts of nitrogen vs 5 of phosphorus vs 10 of potassium. Look for the middle number, the phosphorus, to be zero or at most 1. Lake Winnipesaukee responds quickly to phosphorus loading, which results in more algae and creates all sorts of bad cycles of life. Use lime if your ground cover will accept that. There are iron based products out there that seem to work, but there are controversies about tje other chemicals included in them. Some of the landscapers, especially Stephens, have ideas about how to design and/or maintain your garden in a way that is less damaging to the surface water.