The claim “The best homemade weed killer: no poison (dries everything in 2 hours)” is misleading. There is no homemade weed killer that is both completely harmless and guaranteed to dry out all weeds within 2 hours.
If you’re looking for lower-toxicity options, here are some that can be effective:
1. Boiling water
- Pour directly onto weeds in cracks in sidewalks, patios, or driveways.
- Kills the above-ground parts of many young weeds.
- Avoid splashing nearby plants.
2. White vinegar
- Household vinegar (5% acetic acid) can burn the leaves of small, young weeds.
- Apply on a warm, sunny, dry day for best results.
- It usually does not kill deep roots of perennial weeds, so repeat treatments may be needed.
- It will also damage desirable plants it contacts.
3. Hand-pulling
- The most effective method for perennial weeds is removing the entire root.
4. Mulching
- A 2–4 inch layer of organic mulch (wood chips, bark, or straw) helps prevent new weeds from sprouting by blocking sunlight.
Avoid using salt
Many online recipes combine vinegar, salt, and dish soap. While salt can kill weeds, it’s generally not recommended for garden beds because it can:
- Persist in the soil.
- Harm nearby plants.
- Reduce soil quality, making it difficult to grow plants in that area later.
For most home gardens, boiling water, targeted vinegar applications on hard surfaces, hand weeding, and mulching are safer long-term choices than salt-based mixtures.
