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Allan designs and plants flowering gardens in Montreal, Zone 5 [USDA Zone 4] .

See website, design work and favorite flowering plants at  gardengurumontreal.ca

Consultation and coaching for do-it-yourselfers is provided. Occasional emailed questions are welcome and answered free of charge. Oui, je parle francais.

See my work on Pinterest at Garden Guru Montreal

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Thursday
Jul082010

Update on a Safe Weed Killer

To obtain this product, click on the image to link to the store of Pharm Solutions. On February 10, 2010, I posted a blog about Weed Pharm, a safe, organic weed killer made by Pharm Solutions with industrial food grade acetic acid. The intention was to test it and report back to my readers. Although I had purchased the product online early in the season, a cold spring season delayed my ability to experiment with it. Only in the last four weeks have I been able to use it. Boy is it effective!

For example, at 8 AM yesterday morning, a very hot and sunny day, I sprayed Weed Pharm on a strip of earth measuring 20 feet long and 2 feet wide that was smothered in weeds. By noon of the same day 99% of all of the weeds in the strip were toast, literally, because they shriveled up and turned brown. Repeat: shriveled up and turned brown in 4 hours. A few perennial weeds remain because they require more than one application of Weed Pharm. That is a small task that I am happy to undertake, given how efficient and quickly this product works.

Compare this timeline of four hours to the prolonged time for systemic weed killers to take effect. These glysophates usually take over a week or more to produce results and the extent of harm that they might cause to our planet and to us is not yet completely revealed or fully understood. However, the industrial food grade acetic acid used in Weed Pharm is also used in the manufacture of pickled foods and salad dressings and its organic classification is certified by the USDA. The only cautionary note is that eyes and skin need to be protected because the concentration of acetic acid in this product is 20% compared to 5 or 7% in ordinary kitchen vinegar. I wear prescription glasses so that my eyes are protected and I use leather gloves for all gardening chores so that my hands are sheilded from harsh substances.

I am pleased to have found Weed Pharm; an effective weed killer that replaces toxic herbicides without polluting the environment or placing users health at risk.

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Reader Comments (3)

Wow -- 20% acetic acid is pretty potent stuff! I'd be worried working with that wiithout gloves and eye protection. Glyphosate is incredibly safe, and quickly breaks down in the environment -- it is literally the only spray (organic or otherwise) I use in my garden.
I'll be interested to hear how it works longer term -- glyphosate is so effective BECAUSE it takes so long to work -- during that wait time, it is moving through the whole plants to kill the roots as well as the leaves. Sounds like this product just burns off the leaves, and possibly leaves the roots to come back. I hope you give us an update in a couple weeks to let us know if anything resprouts.

I'm also wondering what that concentrated of an acid is going to do to your soil pH. Seems like it would have to make it more acidic, at least in the short term.

July 8, 2010 | Unregistered CommenterJoseph Tychonievich

Will it work on Ivy?

This sounds like a winner Allan. Do you think it will work on goutweed? I have used weed be gone all summer and most of the weed I have sprayed are still there.

Eileen

July 9, 2010 | Unregistered CommenterEileen

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