The effect of vinegar on soil and garden crops

Vinegar is often used in gardening to control weeds and increase the availability of nutrients. Typically, the product contains 5% acetic acid and has a low pH. The addition of the substance temporarily makes the soil more acidic, and the degree of this effect depends on the volumes, application frequency, and soil type. Prolonged or excessive use can harm the soil.

The application of high concentrations of vinegar can kill plants by damaging their root system and altering the pH, as well as harm earthworms, which prefer a neutral or slightly acidic environment. Vinegar is a non-selective herbicide and kills grass or other plants upon contact. At the same time, it is more effective on young annual weeds with shallow roots than on perennials with a deep root system.

For vegetable gardens, the application of a solution with a concentration of 5% or less is permissible, provided it is carefully applied directly to weeds and the pH level is regularly monitored. It is recommended to repeat the procedure no more than one to two times per growing season in case of extreme necessity. The active ingredient of vinegar (acetic acid) is relatively quickly broken down by microorganisms into water and carbon dioxide, although the change in acidity may persist longer. Vinegar is not suitable as a permanent means to lower the pH of alkaline soils, but can be safely used to clean garden tools from rust and sap.