Yes. The vinegar will deteriorate after the next rainfall. I have
tried vinegar with limited success, but you may have better luck with
it. I pull weeds after a rainfall to limit use of a herbicide. Let us
You're not going to have much luck with the vinegar you get at the
grocery store. Those are only between 2-5% acid. They're already too
watered down to have much of an effect on weeds. The 20% mix you can get
for hoticulural use is what you'd have to start with.
If you paint the weeds, or lightly spray them, you aren't likely to
change the ph of the soil enough to cause later problems. Each rainfall
will wash more away, too. Just don't drench the weeds or the soil.
But even with the stronger vinegar, this isn't some magic cure for a
weed problem. It's probably best around acid loving plants like azaleas,
and for patches of weeds that are too thick to hand pull without
bringing up all the soil. It's not something that's well suited for
weeds in the middle of the lawn.
You can use pickling vinegar at 9% acidity, but add an ounce or two of
d-limonine aka citrus oil per gallon of straight vinegar. Spray weeds in the
hot of the day in direct sun and you will have success. Grass will be growing
there in a second or two after it rains or you water. The most effective
vinegar is the 20% acidic, which you can buy, but it's expensive. I just use
the 9% pickling vinegar I find in the pickling supplies aisle in the grocery
store I shop at.
Need a good, cheap, knowledge expanding present for yourself or a friend?
Last I heard about vinegar for weed control was that to be effective, it had
to be a stronger concentration, more like 24%, than what is available at
the grocery store, usually 5%. Also, it can change the pH of the soil and
doesn't do a good job of killing nasty weeds such as thistles at the root.
Here's some interesting info from Purdue:
Hope this helps!
You can, depends on the weed. Works best when the plant's root system is
limited (e.g. confined to a sidewalk crack), soil moisture low, and
application is on a bright day. Regular 5% grocery store vinegar is fine
under those circumstances. Other applications may require higher
concentrations or alternative removal methods.
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