Quote:
Originally Posted by Pugchief
Incorrect:
Weed torches are designed to heat the plants’ cells causing them to burst. This destroys the weed’s stem, which causes them to no longer be able to ingest water or nutrients, essentially killing the weeds.
weed torch facts |
Please read the entire article, and note this:
Another expert, Mike Orzolek from Penn State, recommends that flaming weeds two to three weeks apart. Flaming will kill annual weeds completely, but does not kill the roots of perennial weeds. Often, gardeners will see new shoots a week or so after flaming and additional treatments can deplete the roots, killing the weeds.