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Compost fire? Toplef10Compost fire? 1zd3ho10

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.

Compost fire? I22gcj10Compost fire? 14dhcg10

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Compost fire?

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Compost fire? Empty Compost fire?

Post  markqz 7/17/2021, 1:53 pm

My daughter found this post about a compost fire.

I'm skeptical, but wondering if it has to do with the added fertilizer?


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Compost fire? Empty Re: Compost fire?

Post  OhioGardener 7/17/2021, 3:52 pm

That can happen (very, very rare) if the compost is excessively dry. If the compost is kept moist and occasionally turned, it cannot catch fire. But, for that matter, the same fertilizers that are used to make bombs can self-ignite.

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Post  sanderson 7/30/2021, 2:08 am

Highly, highly, highly unlikely it had anything to do with compost.  Most likely a careless cigarette or match.  The volume was way, way too small for it to happen.  

Spontaneous combustion requires a huge volume of moist material, like a stack of too-green cut hay.  Or, mega hills of moist compost or mulch.  In other words, a critical mass + moist combustibles heating through normal thermophilic activity. The average compost size is 3'x3'x3' to 4'x4'x4', which is large enough for "hot" composting but too small to combust.

http://www.omafra.gov.on.ca/english/livestock/dairy/facts/hayfires.htm

https://www.bing.com/images/search?q=spontaneous+combustion+hay&qpvt=spontaneous+combustion+hay&form=IGRE&first=1&tsc=ImageBasicHover

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