A good resource to begin are the following two links: Steps To Water Wise Landscape Design & Principles of Design. These sources cover how to approach planning and designing the outdoor living space and the questions that homeowners need to ask themselves in the planning process.
Actual plant selection, hardscapes and design of the landscape is based on the answers derived from the above steps for planning, as well as, homeowner preference.
There are some additional resources that can assist you in deciding what type of landscape suits your needs such as the following:
- Sustainable landscaping and resources:
Xeriscaping (low water) and related resources:
Native landscaping and related resources:
Plant Select is a program that identifies waterwise and garden-tested plants that thrive in the high plains and intermountain regions of the west. Plant Select plants are available at local independent garden centers. Their website is full of information including pre-planned garden designs and accompanying plant lists. The nice thing about these designs is they enable the homeowner to see how the design looks and can be adjusted to size and to incorporate some of the personal elements such as patios, fountains, hardscapes, etc. http://plantselect.org/design/downloadable-designs/
There are also designers who will work with you to draw a plan based on your requirements. Many will install, or you can complete the install yourself at your own pace or as budget allows. Designer referrals can come from family, friends or neighbors, or find one here: Associated Landscape Contractors of Colorado https://www.alcc.com/