Will Vinegar change soil ph?

Asked April 23, 2018, 7:59 PM EDT

Our soils are alkaline. Vinegar is a good weed killer. Will killing weeds with vinegar make my soil less alkaline over time?

Larimer County Colorado

1 Response

Hello,

No, it will not change the soil pH permanently. Our soils are highly buffered and contain a lot of free lime (calcium carbonate). Any acid that is added (like vinegar) is immediately neutralized by the lime (a base).

Here's some information about pH and our soils: http://www.ext.colostate.edu/mg/gardennotes/222.pdf

You can see if your soil has free lime by taking a small sample of soil and pouring vinegar (or any acid) on it...if you see any fizzing, that's the neutralization occurring.