Tobacco Ash in Gardens

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smokingspirit

Lurker
Apr 24, 2019
2
0
I know for a fact if you want to keep ants down, spread the left over tobacco around where they are coming in and will have to find a new way

 

didimauw

Moderator
Staff member
Jul 28, 2013
10,727
37,717
SE WI
It can't be any different than when people or counties controlled burn the prairie fields to complete Ash, so that they grow back Fuller next year. Please tell me I'm not the only one who knows about this!

 

rfernand

Part of the Furniture Now
Oct 2, 2015
669
39
I was told in my youth it’s not great for the soil. A quick google search came back with more details as to why.
A little bit of leftover coffee beans, on the other hand, does wonders for my roses.

 

jpmcwjr

Lifer
May 12, 2015
26,263
30,344
Carmel Valley, CA
It can't be any different than when people or counties controlled burn the prairie fields to complete Ash, so that they grow back Fuller next year. Please tell me I'm not the only one who knows about this!
We did this when I lived in the country in Illinois. But it's not that ash is created that makes the grow-back better. It's the removal, via burning, weeds and dead plant material. It also sterilizes the soil, and seedling get more light with less competition for nutrients.

 

jpmcwjr

Lifer
May 12, 2015
26,263
30,344
Carmel Valley, CA
From UC Davis:

At one time wood ashes were a chief source of potassium and much used in farming and horticulture. While not an important fertilizer anymore, wood ashes have become plentiful around many homes as more people turn to woodburning stoves and fireplaces for heat.

Gardeners with a supply of wood ashes often want to know if ashes are useful as a fertilizer or soil amendment. The questions most generally asked are:

Are Wood Ashes Beneficial?

It depends on your soil. Generally, ashes can be beneficial; they contain potassium, a major plant nutrient plus a number of minor nutrients.

Can Ashes be Harmful?

Yes, if too much is used. Ashes contain chemicals, which are very alkaline with a pH of 10 to 12. They are harmful at high rates, especially in soils that are already alkaline. Since about 80 to 90 percent of wood ashes are water-soluble mineral matter, high rates can cause salts to build up in soils resulting in plant injury.

What Minerals Do Wood Ashes Contain?

Wood ashes contain all the mineral elements that were in the wood. Potassium, calcium, and magnesium carbonate or oxides are present in comparatively large quantities giving the ashes a strongly alkaline reaction which can neutralize acid soils. However, the value of wood ashes as a plant food depends mostly on the potassium content.

In general, wood ashes contain 5 to 7 percent potassium and 1 1/2 to 2 percent phosphorus. They also contain 25 to 50 percent calcium compounds. Hardwood ashes contain more potassium than those from softwood.

Wood ashes lose much of their nutrient value if they stand in the rain, because potassium and other water-soluble nutrients leach out with water. Generally, if leached, the less soluble carbonates remain, leaving the ashes alkaline.

 
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