Homemade Weed Killer

Homemade Weed Killer

Posted by Scott Sharkey on May 23rd 2023

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Homemade Weed Killer

Every year we clean out our greenhouses and have to kill down the weeds which have grown beautifully during the season. Weeds in the greenhouses are getting the best care of course, sun, heat, water and fertilizer from all the plants and flowers being watered, so it gets a little overwhelming by the end of the season.

I really hate to use a standard Round Up type weed killer with glyphosate because I know that it is really a bad chemical, bad for the environment and especially with the chance of circulating in a closed greenhouse it can affect all the flowers.

So this year I set out to pursue different options. I've seen some different homemade recipes for a natural weed killer, but I wasn't sure that they could actually tackle the tough environment of a greenhouse. My goal was to see if any of these DIY recipes would actually work and this is what I found.

Most recipes include white vinegar and dish soap. Where they differ is in the third ingredient. Whether it was salt, epsom salt, bleach or another ingredient.

I fiddled around with different recipes and tried several applications and found which had the best results.

Watch the video below:

Healthy weed (purslane)

Solution applied and shriveled up a few hours later

The below recipe does need to be applied when it is hot out to be most effective. You will start to see results in several hours, but really give it a day and if need be apply liberally again to knock out those stubborn weeds.

Give it a try and see if it works for you.

The aftermath from spraying the weeds

Combine ingredients in a pump-type sprayer. Shake it up to really mix well.

Spray the weeds liberally with the mixture during the daytime.

Epsom salt:

Dawn Dish soap:



If you want to know how to grow beautiful flowers, 

click the picture below!

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