Hi - I just learned about the Question section on our Houzz page so here is a very late response to your question. That plant in the upper left is Table Mountain iceplant. It is a sun lover from South Africa that grows well in our Zone 5 high plains landscapes. This picture was taken early in the morning so it had not yet opened up to show it's full colors. THere are many iceplants that have entered our Denver area market in the past 20 years. Look at Firespinner, Lavender Ice, Mesa Verde, Red Mountain and others.

Hope you have fun with these plants.