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SESK: Stuff Everyone Should Know · sesk.info/horse-manure-compost-heat

A correctly mixed horse manure compost pile heats to what range?

140 to 160 F, held for about three weeks.

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  1. 140 to 160 F ✔
  2. 60 to 80 F
  3. 300 to 350 F

Why: Heat is made by microbes breaking down manure and bedding. A well-mixed pile gets hot enough to help kill weed seeds and parasite eggs. Turn the pile if it goes over 160 F.

Huh, didn't know that: UMN says a 1,000 pound horse passes about 55 pounds of manure a day.

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References

Answer: 140 to 160 F. Heat is made by microbes breaking down manure and bedding. A well-mixed pile gets hot enough to help kill weed seeds and parasite eggs. Turn the pile if it goes over 160 F.

  1. Managing and composting horse manure, UMN Extension extension.umn.edu/node/12861
    A correct mixture pile heats between 140 and 160 F and holds that temperature for 3 weeks.
    Checked 2026-10-10.

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