It’s time.
The vinegar mixture is full strength 10% pickling vinegar with 2 oz. orange oil and 1 teaspoon liquid soap added per gallon of vinegar. This technique works fairly well any time during the winter when the summer grasses are dormant. Those of you with actively growing cool season grasses can’t do this.
Weeds in Paved Areas
In gravel, in cracks and joints in concrete and other paving systems, weeds can be controlled with non-toxic products. Use the same vinegar based mixture mentioned above. These organic herbicides, just like the toxic chemical products, only work on actively growing plants.
Weeds in Beds
Weeds in beds can be killed by removing the tops one last time and then covering the problem area with 1/2" of compost followed by about 5 layers of newspaper or 1 layer of cardboard. Wet it all down and cover the paper with 2-4" of shredded native mulch. Spot spray any weeds that manage to come through with the vinegar herbicide.
Vinegar Herbicide Formula:
1 gallon of 10% vinegar
1 ounce orange oil or d-limonene
1 teaspoon liquid soap or other surfactant such as Bio Wash
Add molasses at 1 tablespoon per gallon to the vinegar formula
Do not add water
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