Natural weed killers
I am looking for effective, alternative weed killers that do just that, but don't harm or pollute. We have read using boiling water will kill the foliage but not the roots and that a mixture of vinegar, salt and washing up liquid is effective. Has anyone tried this mixture and would you recommend it, or do you know of any other alternatives please. We have unwanted plants (not all weeds) growing in our gravel driveway which we would like to dispose of, I have managed to remove at least 50% of them, but the rest are well rooted in. Thanks
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I've just Googled vinegar and plants. It can indeed burn off the top growth of plants, but only at stronger concentrations than household vinegar. If you use the 20% strength (which may be the sort you get at DIY places), it's more effective, but only on annual weeds - it won't kill the roots. In addition, it is very caustic if you breathe in the fumes - so not exactly harmless.
My grandfather hoed his gravel once a week... labour-intensive but effective. And natural, and harmless.