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Milorganite Fertilizer

Slow-Release Nitrogen Fertilizer

Milorganite Logo
Milorganite is one of the oldest branded fertilizers on the market. It’s composed of heat-dried microbes that have digested the organic matter in wastewater. Milorganite is manufactured by the Milwaukee Metropolitan Sewerage District. The District captures wastewater from the metropolitan Milwaukee area, including local industries such as MillerCoors.

Using large-scale processes that mimic nature, microbes digest the nutrients found in the water. The cleaned water is returned to Lake Michigan while the microbes are kiln-dried into small pellets. So Milorganite is actually a bag of dried microbes!
Active Ingredient %
Nitrogen 6.00 %
Phosphorus 4.00 %
Iron 2.50 %
Calcium 1.20 %
Other Ingredients 86.30 %
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$0.99 / lb
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$1.23 / lb
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Not Safe On
No not safe on treatments listed. Please, review the label or contact the merchant for more information.
Maximum Yearly Limits
FL, MD & MI: Apply Milorganite two times a year at the rate of 32 lbs per 5,200 sq ft. FL residents, check with local county ordinances as to fertilizer blackout dates prior to application.
Mowing Instructions
Mow your lawn and allow clippings to remain on the lawn. Grass clippings recycle the nutrients back into the soil.
Fertilizer & Nutrient Analysis
Broadcast Application
Label Rate:
12.8 lbs per 1,000 sqft
Fertilizer NPK Ratio:
6 - 4 - 0
Label Rate Nutrient Analysis:
Ingredient % Mass / Area
Nitrogen 6% 0.77 lbs / 1,000 sqft
Phosphorus 4% 0.51 lbs / 1,000 sqft
Calcium 1.2% 0.15 lbs / 1,000 sqft
Iron 2.5% 0.32 lbs / 1,000 sqft
Label Rate Cost Effectiveness:
Covers 2500 square feet
at a cost of
$12.70 per 1,000 sqft
Nutrient Mass:
Total Nutrient Cost Analysis:
Ingredient Total Mass Cost / Mass
Nitrogen 1.92 lbs $16.54 / lb
Phosphorus 1.28 lbs $24.80 / lb
Calcium 0.38 lbs $82.68 / lb
Iron 0.8 lbs $39.69 / lb

Milorganite Optimized Application Label Rate Calculator

No Control
Broadcast Treatment:
Grass / Turf Types Safe
Annual Ryegrass
Chewings Fescue
Colonial Bentgrass
Fine Fescue
Hard Fescue
Kentucky Bluegrass
Kikuyu Grass
Perennial Ryegrass
Red Fescue
St. Augustinegrass
Tall Fescue
Jump to CertainLabel™ Milorganite Label Rates & Calculator for these 18 turf types
Broadcast Treatment
Label Rate:
12.8 lbs per 1,000 sqft
Cost Effectiveness:
Covers 2500 square feet
at a cost of
$12.70 per 1,000 sqft
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