Baking Soda Weed Killer: A Surprisingly Simple Garden Hack That Works

Baking soda (sodium bicarbonate) is an effective, natural weed killer that’s especially useful for weeds growing in cracks of sidewalks, driveways, or patios. Here’s how to use it:

How It Works

Baking soda kills weeds by:

• Drawing out moisture from leaves (desiccation)

• Disrupting the plant’s pH balance

• Being most effective on young, annual weeds

Simple Recipe

Ingredients:

• 1 cup baking soda

• 1-2 teaspoons liquid dish soap (helps mixture stick to leaves)

• 1 tablespoon vinegar (optional, boosts effectiveness)

Instructions:

1. Mix ingredients in a bowl to form a paste

2. Apply directly to weed leaves (avoid surrounding plants)

3. Reapply as needed (usually within a few days for stubborn weeds)

Best Practices

• Apply on a sunny day for faster results

• Works best on small, young weeds

• Most effective in sidewalk cracks and between pavers

• Avoid using on lawns (can kill grass)

• May need multiple applications for perennial weeds

Advantages

✔ Non-toxic to pets and wildlife when dry
✔ Inexpensive and readily available
✔ No harmful chemical residues

Limitations

• Not as effective on deep-rooted perennial weeds

• Can temporarily alter soil pH where applied

• May need reapplication for complete control

This method offers a simple, eco-friendly alternative to chemical herbicides for spot treatment of weeds in non-lawn areas.