Will Vinegar change soil ph?
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
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.