9 Ways to Kill Weeds Without Harmful Chemicals
When it comes to weed control, the world’s on edge. Monsanto—producer of the most financially successful weed-killer on the planet, Roundup—is currently locked in a mess of legal battles. Rumor and science have it that Roundup’s active ingredient, Glyphosate, causes cancer. As the most widely used herbicide on the planet—on average, a pound of Roundup is used on every acre of cropland in the U.S., half a pound on every acre of cropland worldwide—these findings should alarm all of us.
This is yet another reminder why it's important to seek out non-toxic alternatives to chemical-based herbicides and pesticides. The truth is when it comes to weeds, you can go natural and still get the results you’re looking for. Whereas traditional weed-killers endanger our soil, our water, family and pets, the following chemical-free alternatives threaten only one organism: Weeds!
1. Baking Soda
Sodium makes soil less hospitable to dandelions and other common weeds. To prevent weeds and other unwanted grasses from growing, use baking soda. Apply the baking soda at roughly 1 teaspoon per individual weed plant, being sure to cover the entire plant—including stem, leaves and flowers. Baking soda can also be applied by sweeping it into sidewalk cracks and other common problem areas. Tip: be careful and precise when using baking soda to eliminate weeds, as the sodium can also kill surrounding plant life.
Salt works the same way baking soda does: sodium helps kill and prevent weed growth. Mix a solution of 1 cup salt to 2 cups water, and apply it to any undesirable plant growth using a spray bottle. This solution can also be boiled and then applied for added weed-killing power. Caution: never use more salt than necessary, as considerable salting of soil can render it unhealthy.
Have some extra vodka lying around? If so, you also have a free DIY weed-eliminator. Mix 1 oz. of vodka with 2 cups of water and a few drops of liquid dish soap in a spray bottle. Apply the mixture in the heat of the day, thoroughly coating the weeds’ leaves. This solution works by breaking down the weeds’ natural waxy coat, making them vulnerable to sun damage and dehydration. Note: this method does not work for weeds growing in shade.
4. Pull Them
The obvious tried-and-true method of pulling weeds by hand is still one of the best. This approach is easiest when the soil is soft and wet, like just after a light rainfall. For detailed instructions on how to properly pull weeds, click here.
5. Corn Gluten Meal
While corn gluten meal—a finely ground byproduct of the corn milling process—won’t kill existing weeds, it’s a miracle solution for preventing weed growth. In effect, corn gluten meal works by preventing weed seeds from germinating, and ultimately sprouting. Best of all, corn gluten meal doubles as a nutrient-rich plant food.
6. Boiling Water
When boiled, basic household tap water transforms into a weed-destroying formula. Simply pour the boiling water anywhere you’re experiencing weed troubles (careful—boiling water can also kill surrounding plant life if not applied directly to the weeds alone). Please exercise extreme caution when using this approach.
7. Mulch or Cedar Granules
It might seem obvious, but weeds can be killed naturally simply by denying them sunlight.
Completely cover unwelcome weeds with a few layers of biodegradable newspapers. Then, thoroughly coat the newspaper-covered weeds with a two-inch-thick bed of mulch or cedar granules. (Note: While both mulch and cedar granules will do the trick, mulch is known to attract some types of pests, so we suggest the latter.)
Caution: Any plant life covered in this way will likely die as well, so apply carefully.
Toxic, unnatural oils like motor oil are a big no-no, but new or used vegetable oil is both eco-safe and effective at killing weeds. Entirely coat unwanted weeds by carefully pouring vegetable oil on both foliage and stem. The weeds will be gone in no time.
9. Weed-Suppressing Plants
Like all living organisms, weeds have to compete for limited resources to survive (sunlight, soil, water, etc). Researchers at Cornell University found that certain ground-covering plants are especially good at robbing weeds of these necessary resources. Install the following plants to help keep weeds out of your garden:
- Emerald blue moss phlox
- Thriller lady’s mantle
- Walker’s low catmint
- Majestic Lilyturf
- Golden fleece dwarf goldenrod
- Albiflorus creeping thyme
- Herman’s pride false lamium