Corn gluten is an excellent organic, phosphorus-free fertilizer option. How do you know it's P-free? Look for a zero in the second number (9-0-0).
Research done at the University of Michigan shows that phosphorus levels in the Huron River dropped an average of 28% after the City of Ann Arbor adopted an ordinance that banned the use of lawn fertilizer containing phosphorus.
An article about the study, which was published in the August 14th online edition of the journal, Lake and Reservoir Management, is available here.
An article about the study, which was published in the August 14th online edition of the journal, Lake and Reservoir Management, is available here.
