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Milorganite For Deer Control

What is Milorganite?

MILORGANITE FERTILIZER is a processed sewage sludge that originates from Milwaukee. Sewage sludges are residue of organic matter generated as a byproduct of wastewater treatment.  After wastewater treatment, the water is removed and the waste is heated and dried, then made into small granules.  The heating process kills viral and bacterial pathogens.

The trade name Milorganite R was derived from MILwaukee ORGAnic NITroEn.  This treated sludge is sold as a natural fertilizer with a formulation of 6-2-0 (N-P-K)
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Will Milorganite Keep Deer Away?

A Cornell Extension agent in New York tested Milorganite on ornamentals that deer liked to eat and found it effective.  His plots included yews,tulips, and hostas. His research in New York found that broadcasting this fertilizer at 5 pounds/100 sq feet, applied every two weeks reduced deer damage in the summer when alternative foods were available to deer.  It was not proven to be effective in the winter when other food sources were not available. 

In another research test, MILORGANITE FERTILIZER tied in sachets reduced damage to Yew shrubs.

At Berry College, in Georgia, Milorganite was found to reduce damage to Chrysanthemums in two different locations.  Milorganite was applied overhead at 4 oz. per plant. In this study Milorganite did not completely emilinate deer damage, but it did greatly reduce it. They suggest reapplying the product after the first sign of damage.

In another study in Georgia, they research the effect of Milorganite to repel deer from food plots.  MILORGANITE FERTILIZER did reduce damage to soybean crops.

On our deer repellent recipes page of this site Readers comments submitted about Milorganite you can read reviews from other readers that recommend MILORGANITE FERTILIZER .  Other refernces on the internet suggest it works well in Washington DC to save pansies and hostas.

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If Milorganite isn't available in your area, it can be shipped from our supplier to your door anywhere in the US.

Deer Departed Recommends The Follow Product To Go Along With Milorganite

MILORGANITE FERTILIZER has been shown to work well, but would be much better combined with a product like the one below. We like product because it works with both a water spray and a loud noise. It is solar powered and has a water reserve, so it doesn't need to be hooked up to water or electricty.

For Other Natural Deer Repellents - Go to


Natural Deer Repellent Page OR check out all kinds of deer repellent by reading reviews and comparing prices at Repellent Reviews

Motion Detector Deer Repellent

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What Other Visitors Have Said

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litemoves  starstarstar
I have used milorganite at the first emerging signs of growth in the spring. It really worked well as I think the deer associated my garden with a bad ...

RPB  Not rated yet
Several years ago we purchased some bushes from a local nursery and the nursery suggested we use milorganite to keep deer from eating our bushes and flowers....

Deer do not like, but neither do some of the plants  Not rated yet
I have used Milorganite (about 12 bags this spring) but I have to say that my plants burned terribly, especially things like roses if I left any of the ...

Home Gardner  Not rated yet
I have approximately 18000 square feet of centipede grass in my yard here in western north carolina. I used an application of Milorganite on my yard once ...

It works well in commercial orchards  Not rated yet
We have a commercial orchard and we can't spray around the fruit. Milorganite works well as a repellent that is safe for us to use.