Salt is one of the most potent natural herbicides available, working by dehydrating plants and making soil inhospitable to future growth. However, it should be used with extreme caution as it can sterilize soil for extended periods.
Preparation: Combine 500ml of water with 250ml of salt in a pot. Bring the mixture to a rolling boil, stirring until salt completely dissolves.
Application: Pour the hot salt solution directly onto the weed while still warm. The combination of heat and salt provides immediate shock to the plant while the salt prevents regrowth.
Important Warning: Only use salt in areas where you never want plants to grow again, such as driveways or walkways. Salt can remain in soil for years and will kill any plant that tries to grow in treated areas.
White Vinegar Treatment
The acetic acid in vinegar burns plant tissues and disrupts cellular function, making it an excellent natural herbicide for many weed species. Higher acidity levels provide better results.
Application: Use undiluted white vinegar with at least 5% acetic acid content. For stubborn weeds, seek out horticultural vinegar with 10-20% acetic acid. Spray directly onto weed leaves and stems on a sunny day. The acid works faster in warm, bright conditions.
Timing: Apply vinegar in the morning when temperatures are rising. Most weeds will show signs of damage within hours, with complete death occurring in 2-3 days.
Best for: Annual weeds and young perennial weeds. May require multiple applications for established perennials.
