The claim “THIS burns weeds in 1 day! They NEVER grow again” is almost certainly an exaggeration.
Many homemade and commercial weed killers can make weeds wilt within a day, but no spray guarantees that weeds will never return. Whether a weed comes back depends on its root system, whether seeds remain in the soil, and the type of weed.
Here’s what common weed-killing methods actually do:
- Contact herbicides: Burn the leaves quickly, often within hours to a day. Deep-rooted perennial weeds may regrow because the roots survive.
- Systemic herbicides: Move through the plant to the roots. They are generally more effective against perennial weeds but may take several days or weeks to kill the entire plant.
- Homemade mixtures (such as vinegar, salt, or dish soap): Often scorch the visible parts of weeds but usually do not kill established roots. Salt can also damage the soil and make it difficult for desirable plants to grow.
To prevent weeds from returning, it’s usually necessary to combine methods:
- Pull or dig out perennial roots.
- Apply mulch to block new seedlings.
- Remove weeds before they produce seeds.
- Use an appropriate herbicide, if desired and according to the label.
So, while some products can make weeds appear dead within a day, the claim that they “never grow again” is not supported in general. Persistent weeds often require repeated treatment or removal.
