If you’re asking about the claim behind this headline: be skeptical of “burns weeds in 1 day—never grow again.” Most DIY weed-killing mixtures can damage the visible leaves quickly, but that doesn’t guarantee the roots are dead or that the weed will never return.
A safer explanation:
- Boiling water can kill foliage and shallow-rooted weeds on contact, but perennial weeds may regrow from their roots.
- Vinegar can burn leaves quickly, especially in strong concentrations, but it often doesn’t kill established perennial roots.
- Salt can suppress vegetation, but it can also damage soil and nearby plants for a long time, so it’s generally a poor choice for garden beds.
- Flame/torch weeding can kill the above-ground portion, but repeated treatments may be needed for regrowth.
For lasting control, the best method depends on whether the weeds are in a lawn, flower bed, driveway, or cracks in pavement. Also, never mix household chemicals such as bleach, ammonia, or acids—dangerous gases can result.
