Xeriscaping has a mixed legacy in Utah. People import exotic flowers from Turkey that can grow with little water. These flowers escape the garden and become invasive noxious weeds in the desert.
My preferred method for gardening is to play close attention to the flowers in the open lands surrounding a town. I gather seeds from the native plants and use those instead of imported exotics.
This picture shows a Mulesear which is a cousin of the sunflower. It took several years for any of the plants to bloom, but when they bloom they have a super bright yellow flower.
The one problem with my philosophy is that people need to research flowers. I told my methodology to other gardeners. They then run out into the mountains and get the seeds of the invasive weeds!