I designed a very long space (nearly 150') for a client last spring, who then purchased all of the plants and over several weeks installed hundreds upon hundreds of 3" pots. I am amazed at how fast the garden has filled out in just a year with no supplemental watering or fertilizer -- luck, I guess! 100% native plants.
And somehow we ended up at the Sarpy County fairgrounds to stubble upon this Nebraska Statewide Arboretum bed, very narrow and in an unforgiving location, awash in blooms:
Oddly, the red fire zone paint on the curb ties in nicely with the Gallardia and coneflowers, don't you think? :)