What method can significantly reduce water usage in landscape irrigation?

Xeriscaping is a landscaping approach designed to save water and minimize the need for irrigation. This method involves selecting drought-resistant plants, incorporating efficient watering techniques, and designing the landscape to retain moisture. By reducing the overall need for irrigation through thoughtful plant selection and landscape design, xeriscaping helps ensure that landscapes thrive with minimal water input.

In contrast, drip irrigation, while efficient and effective in delivering water directly to plant roots, still requires some irrigation and does not change the landscaping approach itself. Flood irrigation and traditional sprinkler systems can lead to higher water usage due to less efficient distribution and higher evaporation rates. Therefore, xeriscaping stands out as the method that most significantly decreases reliance on irrigation altogether, promoting a sustainable landscape that conserves water.