This question confuses many people who expect Xeriscape to be a specific look or specific group of plants. Xeriscape is actually a combination of common-sense gardening principles that save water while creating a lush and colorful landscape.
Plan & Design... for water conservation and beauty from the start.
Create Practical Turf Areas... of manageable sizes, shapes, and appropriate grasses.
Select Low Water Plants... and group plants of similar water needs together.
Use Soil Amendments... like compost or manure as needed by the site and the type of plants used.
Use Mulches... such as woodchips, to reduce evaporation & to keep the soil cool.