The headline “The best homemade weed killer: no poison (dries everything in 2 hours)” is a common gardening claim, but it is often exaggerated. Some homemade mixtures can burn the leaves of weeds quickly, but they usually do not permanently kill the roots, especially for deep-rooted or perennial weeds.
A commonly shared homemade weed spray is:
Vinegar-based weed spray
Ingredients
- 1 gallon (about 4 liters) household vinegar (higher-strength horticultural vinegar works better than kitchen vinegar)
- 1 tablespoon dish soap (helps the liquid stick to leaves)
How it works
- The vinegar’s acidity can dry out and damage plant leaves.
- Results may appear within hours in sunny, warm conditions.
- It works best on young, small weeds.
Important cautions
- It can also damage grass, flowers, vegetables, and other plants you want to keep.
- Avoid spraying near desirable plants.
- Adding salt is often suggested online, but it can harm soil and make areas difficult for plants to grow in.
For long-term weed control, methods like mulching, removing roots, and preventing weeds from going to seed are usually more reliable than a quick spray. No homemade recipe can honestly guarantee that weeds will “never grow again.”
