Wood ash

Asked May 27, 2014, 11:07 AM EDT

I burn wood for heat in winter and spread the ash in my vegetable garden. Soil test indicates a 9 pH, could the ash be causing the high pH and is it good to put the ash in the garden?

Macomb County Michigan soil and fertility issues

1 Response

Wood ash definitely increases soil pH which probably accounts for the extremely high pH that you have. Southeast Michigan soils are usually alkaline to begin with so adding wood ash could make it more so. Vegetables prefer a pH of around 6.5 so you will probably need to reduce the ph of your soil. Here are linkls to more information on wood ash in gardens:

http://msue.anr.msu.edu/news/wood_ash_in_the_garden
http://www.hort.purdue.edu/ext/woodash.html