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Killing Weeds With Hot Water

Category Weeds
This method of non herbicide weed control has become popular. Be aware that it can damage shallow rooted flowers near by and kill beneficial mico-organisms in the soil. It is also not effective on all weeds. This is a page about killing weeds with hot water.
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September 16, 2005

Question:

If I use hot water to kill my weeds, will it kill my other flowers around the weeds? I am only pouring the hot water on the weeds. How long will it take to kill the weeds.

Thank you,
Beverly Dickerson

Answer:

This method of weed control has certainly gained a lot of attention on the past few years. As long as you use it as a topical spot treatment, your flowers should be fine.

The idea is that the hot water melts away the coating on weed leaves, or it severely damages the weed plant's cellular structure. The weeds are then unable to retain moisture and dehydrate within anywhere from a few days to a few short hours. At times, as with all herbicides, additional treatments may be necessary.

The only real problem with this form of weed management is that the hot water also kills beneficial soil microorganisms (as do traditional chemical methods). Desirable plants with shallow root systems can also be damaged if care is not taken during application.

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The hot water method will not control all weeds, but is effective against many. Burning or searing weeds with infrared heat or a propane flamer is equally as effective and may be more energy efficient in the long run.

Answers

By Wendee (Guest Post)
September 16, 20050 found this helpful

It won't harm plants that don't get the hot water on them. Basically what the hot water does is "cook" them.

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By Beth (Guest Post)
September 17, 20050 found this helpful

Cut the weed back to ground level and pour the hot water only on the root. Safer for nearby plants and faster destruction of the weed.

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By (Guest Post)
January 15, 20070 found this helpful

thanks

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July 14, 20101 found this helpful

Thank You!
I tried this on the grass that was growing between my patio bricks and it worked wonderful. Thank you for such a wonderful suggestion.

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roadrouser

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Home and Garden Gardening WeedsMay 17, 2017
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