An organic weed killer is especially important in certain regions of the United States where it doesn't rain very often. Using chemicals like roundup all year long to kill weeds causes a chemical buildup that keeps growing until a good rain storm finally hits, and then all the chemical buildup from every yard suddenly drains into the sewer system on its way to the ocean. In regions of low rainfall, whenever it does finally rain, beaches and coastline are often polluted for days, and beach goers are advised not to swim. That's pretty sad if you ask me that there can be that much pollution runoff.
That's why I've been investigating organic weed killer instead. I helped run a landscaping business in a low rainfall region and constantly had to battle between being efficient and being environmentally friendly. In the end, our customers appreciated the fact that we took a little bit of extra time and energy to help protect the environment and be cautious. There are a few organic household compounds that work pretty well as organic weed killers. The nice thing about these chemicals is that they're generally pretty cheap too.
The basic principle around why organic weed killers work is because they're almost always some sort of acid. Weeds hate acid as do regular plants, but the interesting thing is that not all plants hate acidic soil. Some plants grow very well in an acidic environment, though most weeds don't. So there's a little trick for you. If you want to plant a garden but don't want a host of weeds growing up, plant a few acid loving plants and keep your soil more on the acidic side with things like coffee grounds and garden sulfur. Acidic soil is why you hardly ever see anything growing beneath those varieties of pine trees that drop their needles. Pine needles cause the soil to become acidic, and when you pair that with the overshadowing tree taking up most of the sunlight, you have a very good barrier against weeds.
So what are the varieties of plants that grow well in acidic soil? Here are some common garden plants that are especially acid loving:
Azaleas
Camellias
Blueberries
Gardenias
Hibiscus
Hydrangea
Magnolia
There are many more. The plants are not only beautiful, they also prefer the type of soil that weeds don't generally like. That's the reason that if you're thinking about giving organic weed killer a try, plant some plants that are acid loving as well so that they can benefit from the vinegar spray and not be harmed by the raise in the soil pH. It's a win win situation. If you want to try an organic weed killer but you don't have acid loving plants in your garden, you'll have to be especially cautious that you don't use too much of the spray because if enough of the vinegar is washed into the soil, it can temporarily change the pH and harm the regular plants. This changing of the pH is only temporary though with most organic weed killers, and definitely in the one we'll discuss next.
Now that you know the pros and cons of organic weed killer and the best environment to use it in, here's a quick explanation of what to use. Acetic acid has been the most effective natural herbicide that I've discovered. What's acetic acid you ask? Vinegar. Household white vinegar that you buy in the store is 5% acetic acid. It is effective at killing weeds on its own, but for real results, you might need something with a bit more of a punch. If you come across distilled white vinegar that's 15% or even 30% strength, it will do a much better job as an herbicide. You can generally find stronger distilled vinegar at places that sell lots of horticulture supplies.
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