Does weed burning kill the root?

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wahoowad

Minister of Fire
Hearth Supporter
Dec 19, 2005
1,678
Virginia
As an alternative to spraying gallons of roundup in my gravel driveway I’m thinking of buying a propane weed burner. I’m sure it will destroy any exposed weeds/grass but will it kill the root too? I held off on spraying the driveway this year as we have a new puppy and didn’t want it chewing treated weeds. Tried vinegar, that worked on some younger weeds but not all of them.
 
Flame weeding kills the above-ground portion of the weed, but it doesn't kill the roots. Flame weeding kills some annual weeds for good, but perennial weeds often regrow from the roots left in the soil. Perennial weeds require several treatments at two to three-week intervals.