Crucial DIY Weed Killer Tips To Know Before You Spray

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Vinegar and soap is a popular and quite effective combination home gardeners use to control weeds naturally. Vinegar destroys the leaf and stem tissue of the plants it comes in contact with, works fast, and has a high success rate against annual broadleaf weeds. However, you’ll likely be using household vinegar, which is half as strong as horticultural vinegar with acetic acid concentrations under 10%. That’s fine for young weeds, but for larger weeds or weeds with taproots, use stronger vinegar, with acetic acid concentrations between 10 and 20%. Be careful, as vinegar kills plants indiscriminately and more acidic vinegars can cause burns and eye irritation. 

Another option is tap water. Simply boil water and pour it over a batch of young weeds with shallow roots to kill them. While it has little impact on the environment, boiling water has a limited effect on perennials or weeds with deep roots. You might also add dish soap to your weed control mixture to help the active ingredients stick to the surface of the plants and kill them faster.

Meanwhile, some household ingredients should be avoided as potential weed killers. Borax, while effective, negatively impacts the soil since its main ingredient, boron, doesn’t break down quickly. The same goes for table salt, which is so toxic, it can damage the soil structure — and worse, it can move through your soil to other parts of your yard or garden, ruining your plant and grass growth.

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