Crosswords3 mins ago
Salt as weedkiller
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For more on marking an answer as the "Best Answer", please visit our FAQ.May be useful: http://www.the-organic-gardener.com/organic-weed-control.html and re salt, this site sells a salt applicator to get to the roots of weeds: http://www.mower-magic.co.uk/acatalog/Weed_Sticks.html and for quantities as a liquid, extract here states 'Is it safe to use salt on asparagus plantings? Salt is not beneficial to the healthy growth of asparagus. Salt was once used as a weed killer in asparagus beds. Two pounds of salt per gallon of water was sprayed on the bed early in the season. Since we now have very effective herbicides, they are better for weed control. Salt will gradually deteriorate the physical nature of the soil.'
Back to vinegar again as well: For the organic gardener there are some herbicides which are derived from plant sources.
'Vinegar is a biodegradable natural agent which will kill plant material; normal vinegar for putting on your chips contains about 5% acetic acid and is produced from grapes, apples or grain by fermentation in anerobic conditions. This weaker product works on some young weeds, but higher concentrations produced by distillation (15%) and freeze evaporaton (30%), are needed for a more effective herbicide. The vinegar degrades after a few days so any increase in the pH is only temporary. extract from natural gardening advice.
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