If you mean a weed-killing product or “hack” claiming “burns weeds in 1 day and they never grow again,” that claim is usually misleading.
- Some products can make weeds look dead within hours to a day by burning the leaves (often called “contact” herbicides).
- That does not mean the roots are dead, so many weeds can grow back.
- Long-term prevention usually requires a combination of removing the roots, improving soil conditions, mulching, or using an appropriate residual herbicide (where legal and suitable for the area).
If you have a specific product name, ingredient, or a photo of the label, I can help check whether it actually prevents regrowth or just burns the top growth.
