Every now and then we get questions about organic ways of getting rid of your weeds. We told you about ways to remove your existing lawn without using chemicals with sheet composting and soil solarization, and now we can share our mini trial with some organic weed killers!

In our comparison we trialed a couple organic herbicides, Biosafe Weed Control and Avenger Weed Killer, both were purchased online at Amazon, but you can also try your local garden center.

Both had a citrus-y sort of smell which wasn’t too bad at all! We sprayed 5 pumps of each onto California Buffalograss, and two types of weeds. Here are the results:

After just 4 hours Biosafe was already showing signs of browning on the grass and it had totally killed the weeds. At the same time, Avenger did not show any effect on California Buffalograss, but it did have a good effect on the weeds, although they still had a bit of green in them compared to Biosafe.

After several days ( with no additional applications), the results were even more obvious. Below is the effect on California Buffalograss from the initial spray 4 days prior.

After 4 days, both sprays yielded similar results from the initial application:

Biosafe sprayed on with a “soapy” sort of liquid that seemed to stay on the foliage longer, while Avenger had more of a milky liquid appearance.

We found both Biosafe and Avenger to be effective as an organic weed killer on all sorts of weed types, unfortunately it will also effect your California Buffalograss. But it does offer you an organic way to spot treat your weeds!