I use vinegar for weeds. The idea being that grass loves our alkaline soil and the vinegar, in addition to burring exposed plant tissue, makes the soil more acidic. I have used it on stands of grass 18-24 inches high. I had to repeat as the first dose killed the above ground parts, but new blades continued to grow. I have also poured additional vinegar on the base clump of larger grasses. Given enough I have one bed area that has remained almost free of grass after this treatment. When I say grass, I am not talking about lawn grass, but wild grass that spreads by rhizomes. Colleen NE Calif. -----Original Message----- From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Leo A. Martin Sent: Thursday, April 04, 2013 10:19 AM To: pbs@lists.ibiblio.org Subject: Re: [pbs] Vinegar for weeds I couldn't tell whether anybody replied to Alberto's query about using vinegar on weeds. Yes, it works on most but not all weeds. Spray cooking vinegar (5% acidity as sold in the USA) on young weed seedlings. It seems less effective on older seedlings or plants, especially dandelions. By the way, judging by the number of people writing me privately for unobtainable plant material, this is by far the most gullible plant group to which I subscribe. Leo Martin