Why Use Milorganite?

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 All purpose Milorganite fertilizer contains slow release organic nitrogen.

Quick Tips

  • Proven for over 85 years
  • Goof-Proof - Won't burn your lawn or plants
  • Slow-release for Balanced Growth

Easy. Versatile. Effective.

Proven for Over 85 years

For over 85 years Milorganite has fertilized golf courses, home lawns and gardens.

Goof-Proof -Will Not Burn 

Milorganite is worry-free because it contains virtually no salts, so it will not burn plants – even in the hottest temperatures and driest conditions. You don’t have to water it in, it will stay in the soil ready to work when moisture comes later.

Slow-Release for Balanced Growth

Milorganite’s slow-release formula provides nitrogen and other nutrients up to 3 months, for even growth (without excessive grass clippings) and better root development. Because grass is able to use these nutrients over a longer period of time, less fertilizer is wasted by seeping into groundwater or running off into streams.

Adds Organic Matter to Feed the Soil

Milorganite contains 85% organic matter, which promotes beneficial microbial activity and improves the soil’s ability to grow and nurture grass and plants. Milorganite is ideal for sandy soils because it does not leach.

Iron that Greens without Staining

Milorganite’s iron is exceptional at delivering a long-lasting green. Unlike iron salts in some synthetic fertilizers, Milorganite’s organically complex iron won’t stain concrete.

Environmentally Friendly and Sustainable

Milorganite is one of the nation’s oldest recyclers, transforming a byproduct into a highly effective fertilizer. No mined resources are used in its production. A landfill gas project will also significantly reduce Milorganite’s use of natural gas and "green" our production process. Milorganite was recently certified by the USDA as a bio-based product since it is derived from renewable materials.

Essential Nutrients

It takes more than nitrogen, phosphorus and potassium to optimize plant vigor. Fortunately, Milorganite contains all 13 essential plant nutrients, including secondary nutrients like calcium and micronutrients like iron and zinc.

Typical Milorganite Analysis
Primary Nutrients Secondary Nutrients Micronutrients
Nitrogen (N) 5% Calcium (Ca) 2.1% Iron (Fe) 4.34%
Phosphorus (P) 2% Sulfur (S) .58% Zinc (Zn) .045%
Potassium (K) .32% Magnesium (Mg) 0.68% Copper (Cu) .022%
    Manganese (Mn) .133%
    Boron (B) Trace
    Chlorine (Cl) Trace
    Molybdenum (Mo) Trace


Safety is our number one concern. Milorganite meets the most stringent criteria imposed on any fertilizer product for health, safety, and environmental concerns. Milorganite complies with all federal and local limits, which allows Milorganite to be used for all of your fertilizing needs.