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Watering Garden

Non-toxic Herbicide - Corn Gluten Meal(CGM)

In 1990's, Dr. Nick Christians discovered corn meal could inhibit the growth of weed when the seeds are germinating and recommended CGM as a pre-emergent herbicide. This method is most applicable to crabgrass and dandelions, but the timing of application is very important. CGM is not effective for grown weeds, in contrary it would make the problem worse as CGM is a good fertilizer for most plants.

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Weeding Tips

To remove the unwanted grass or weed in the cracks between stone or cement blocks on a patio.

1. Use a 4-5 inch metal scraper or a table knife. Slide the flat blade into the soils and cut the buried roots.
2. Usually, You can pull out the grass plant easily by hand.
3. Then, you may want to refill the void with loose sand.

For a larger area, it is more efficient using commercial weed-killer. To use less harmful chemicals, first use an electric or gas-powered grass trimmer to cut off the grass stems. Set the trimmer line as low as possible to the surface. You can make a homemade weed-killer by mixing vinegar, dish soap with tap water (see House Cleaners). Spray the solution to the grass roots. The grass should die out within 1 week and do not re-grow from the roots.

Warning: The chemical solutions will affect the chemistry of the soils and is not suitable for other areas. For lawn, sprinkle a little bit of fertilizers at the spots of weeds. It might kill the weeds and encourage the good grass to crowd out them.

Some ideas from other websites:
One weed-killer recipe: 4 cups (1 litre) white vinegar, 1/5 cup (50 ml) table salt, 2 tablespoon (10 ml) dish soap.
Other alternatives: 1. just boiling water. 2. undiluted vinegar caution: first check if the solution strength adversely affects the cement and rock minerals).

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