Peg--P.S.--I just looked up Vinegar at the Dirt Doctor site. I heard him tell someone on the radio last week that they could spray vinegar around the base of a tree, but evidently that's a large established tree only.

Vinegar will kill the foliage, not the roots of the grass, so you should keep at it every week or so until the roots give up trying to send up more spouts. I'll call next week for a clarification on the tree/vinegar bit. Meanwhile, here's what he says on the web site:

Vinegar - The Organic Herbicide

The best choice for herbiicide use is 10% white vinegar. It should be used full strength. I've mentioned 20% in the past but it stronger than needed and too expensive. Avoid products that are made from 99% glacial acetic acid. This material is a petroleum derivative. The proper vinegar is distilled from grain alcohol. Natural vinegars such those made from from fermenting apples have little herbicidal value. They are used in irrigation water and as an ingredient in Garrett Juice.

Herbicide Formula:

1 gallon of 10% vinegar
Add 1 ounce orange oil or d-limonene
1 teaspoon liquid soap or other surfactant
Do not add water

Spot spray weeds and keep the spray off desirable plants. This spray will injure any plants it touches.

And on another page, he has posted:

Vinegar Fungicide
Mix 3 tablespoons of natural apple cider vinegar in one gallon of water. Spray during the cool part of the day for black spot on roses and other fungal diseases. Adding molasses at 1 tablespoon per gallon will again help.

SRS