Why Use Milorganite?

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 All purpose Milorganite fertilizer contains slow release organic nitrogen.

Quick Tips

  • Proven for over 90 years
  • Will not burn your plants or lawn
  • Slow-release - Feeds up to 10 weeks

Proven for 90 years

For over 90 years Milorganite has been trusted by golf courses and homeowners for its consistent and long-lasting results.

All Purpose

Milorganite is an all-purpose organic nitrogen fertilizer that can be used on lawns, plants, flowers, vegetables, shrubs, trees, and as a seed carrier.

Goof-Proof - Non-Burning

Milorganite is worry-free because it contains virtually no salts, so it will not burn your lawn or 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.

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 will not stain concrete.


Milorganite’s slow-release formula provides nitrogen and other nutrients up to 10 weeks, 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. 

The slow-release organic nitrogen feeds plants evenly and gradually, without interfering with flowering and fruit development. This nurtures the roots, which in turn develop more robust yields.

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.

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 production; Milorganite continues to explore alternative energy sources such as solar, digester methane, and landfill gas to run its operations. Milorganite is 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.