Milorganite is a fertilizer made from Milwaukee sewage sludge. Deer are totally repulsed by sewage sludge, which is also a great fertilizer. Being organic, there is virtually no risk of burning your plants by over-fertilizing. However, like most organic fertilizers, Milorganite is also slow acting. Over the years there has been some controversy over Milorganite.
Sewage sludge contains heavy metals, particularly cadmium.
In relatively high concentrations cadmium and other heavy metals have been known to cause Cancer. Consequently, in 1993 the EPA put restrictions on the amount of heavy metals Milorganite and other bio-solid fertilizers may contain. Prior to 1994 Milorganite's label stated it shouldn t be used on food crops, as it contained heavy metals.