Answer: Wood ash does provide some nutrients, most notably potassium, for your soil. It also raises the pH and can increase soil salinity, however, so it should be used with caution. If you have your soil tested and it's too acidic and needs potassium, you could mix in some wood ash at no more than 2 pounds per 100 square feet. Keep the freshly spread ash a few inches away from any plant material. Possibly the best use of your ash is to spread it over snow and ice to provide traction during the winter.
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