Hortaholic said: Phosphorus has been removed from most lawn fertilizers now because of repeated applications causing buildup.
Only where we live. Most states in the US still allow it in lawn fertilizers. It's largely an upper midwest thing to ban or at least severely limit phosphorus in lawn fertilizers. A lot of that's driven by Great Lakes health. We have a more direct relationship to the effects of fertilizer runoff. It's a great idea to voluntarily limit phosphorus other places even if the effects are far removed, like in the Gulf of Mexico. Not spending money on spreading something that's not needed because of decades of overfertilization is an added benefit. For most of the US it's voluntary, though.
Great post aside from that quibble.
