That claim is almost certainly an exaggeration.If someone is advertising that “THIS burns weeds in 1 day! They NEVER grow again,” here’s what to know:
- Many weed killers can cause visible wilting or browning within 24 hours, especially contact herbicides.
- However, “never grow again” is generally not true. Many weeds regrow from roots, rhizomes, tubers, or seeds already in the soil.
- Even systemic herbicides that kill the entire plant don’t prevent new weeds from germinating later unless they also contain a pre-emergent ingredient.
- The only way an area stays permanently weed-free is through ongoing management (mulch, landscaping fabric, regular maintenance, or long-lasting soil sterilants—which are only appropriate in limited, non-garden settings and can harm desirable plants).
If you saw this in an ad or video, it’s best to treat “never grow again” as a marketing claim rather than a guarantee.
If you can tell me what product they’re referring to (or upload a screenshot of the ad), I can explain how it actually works and whether the claims are supported.
