That claim is almost certainly an exaggeration.
No household spray or DIY mixture can reliably burn weeds in one day and ensure they never grow again.
Here’s what different methods actually do:
- Contact weed killers (including many vinegar-based sprays) can burn the leaves quickly, sometimes within hours or a day. However, many weeds regrow because the roots survive.
- Systemic herbicides move through the plant to kill the roots and are more effective on perennial weeds, but they still don’t guarantee weeds will “never grow again.” New weeds can sprout from seeds later.
- Pulling weeds, covering soil with mulch, or using landscape fabric can help reduce regrowth, but ongoing maintenance is usually needed.
Be cautious of videos claiming “never grow again”—they often omit follow-up treatments or show only short-term results.
If you’re trying to get rid of a specific weed (such as dandelions, crabgrass, bindweed, or poison ivy), I can recommend the most effective and safest approach for that type.
