If you mean a homemade weed killer that dries/burns down weeds quickly without using commercial poisons, a common option is a vinegar-based spray. However, there is no truly “non-poison” homemade spray that kills only weeds in 2 hours without also potentially harming other plants, soil life, or the surrounding area.
A fast-acting homemade contact weed spray:
Ingredients
- 1 gallon (about 3.8 L) white vinegar (5% acetic acid)
- 1 cup table salt (optional; makes it more damaging and longer-lasting)
- 1–2 tablespoons dish soap (helps it stick to leaves)
Method
- Mix the ingredients in a sprayer.
- Spray directly on weed leaves on a hot, sunny, dry day.
- Avoid spraying grass, flowers, vegetables, or desired plants.
What to expect
- Leaves may wilt or look scorched within a few hours, especially in strong sun.
- Deep-rooted weeds often grow back because vinegar mainly burns the foliage.
- Salt can damage soil and prevent future plant growth, so it is best avoided near gardens.
For a truly low-impact approach:
- Pour boiling water directly on weeds in cracks, paths, and driveways.
- Pull weeds after watering/rain when roots loosen.
- Use mulch to block new growth.
If you mean “dries everything in 2 hours” as in a product that kills all vegetation quickly, be careful: anything that works that fast is usually a strong herbicide or a non-selective burn-down chemical, even if marketed as “natural.”
