I have an open space that is approximately 20 ft by 20 ft. I need bushes or shrubs or some type of flowers that I can plant that will make it through our harsh Wyoming winters and hot summers! We moved into our new house about a year ago and we have 6+ acres of land. We won't be landscaping all of it, just a little at a time....so I'm starting with this small space! Anything suggestions as to design, what to plant or where to plant would be super helpful! Thank you in advance!