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"Organic" lawn care company: "humic shale"

 
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Searching for a company that does natural lawn care in my area.  A company says they feed with products derived from "humic shale" which they describe as 75 million year-old decomposed matter drawn from the earth.  Isn't this the definition of Fossil Fuel/petroleum?
 
master steward
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Hi, Monica Welcome to permies.

If you will give the location where you are looking for a lawn care company it will better assist our members in helping you.
 
Monica Shapiro
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Southeast Michigan.  I contacted the company with the shale and they said shale is shallower than petroleum and a different beast, can't be ignited is safe for humans, pets etc.  

Our soil is "Conover Clay".  
 
garden master
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Those humic products, though widely marketed to people concerned about "organic" fertilization, have been pretty resoundlingly debunked from an effectiveness standpoint:

Humic Substances Generally Ineffective in Improving Vegetable Crop Nutrient Uptake or Productivity

 
Monica Shapiro
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Ah - so ineffective, and not exactly organic.
 
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