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permaculture - Re: [permaculture] Re Wood Ashes as a soil amendment

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  • From: Allan Balliett <aballiett@frontiernet.net>
  • To: permaculture <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Re Wood Ashes as a soil amendment
  • Date: Sun, 17 Dec 2006 15:18:18 -0500

Karen -

First off, it depends on what sort of wood ashes you are talking about. Are you talking about hardwood ashes from a fireplace or wood stove?

If so, I think that wood ash has a value to the soil that outweights the dangers that recent posts have emphasized. You certainly don't want to put a lot on and, if you have high pH like I have, you are going to have to deal with that pH in some fashion, as well.

I'll post more information about the nutritional/biological value of wood ash to this list as I get a chance. In the meantime, think 'slash and burn.' Fertility declines AFTER the ash is exhausted and the ash does NOT inhibit germination or plant growth.

But I'll see what else others say and post it here.

Thanks

-Allan

So, any suggestions on what to do with the wood ashes? Pick one spot and designate it as the 'ash dump'? Get them off the property? To where?
The soil only needs a tad, we don't want to breathe them or have them in our water, not in the compost... Is it safe to use them to dampen
plant growth, say along a fence line that is hard to mow?

Karen


On Dec 17, 2006, at 8:08 AM, Lawrence F. London, Jr. wrote:

john norton wrote:

Hi
Be careful if using wood ash as a soil amendment. The
burning can form polycyclic aromatiic hydrocarboms
PAHs in the ash, which can be acutely toxic to plants
and people and they can be carcinogenic.

If at all, only use small amounts of wood ashes in
gardens. A friend years ago put all the ashes from his wood stove on his large garden
> year after year. The soil became poisoned and very little would
grow in it. It took him years to get it back to normal.

Never add wood ashes or any pH mediating product to a compost pile. The bacteria in compost regulate pH themselves;
if you override this with ashes or lime the pile will cease to function normally and you will end up with poor compost.

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