colorado native perennials only in narrow borders along the edges at the base of the stone retaining walls down the left side and in a thin band across the foreground rocky mountain columbine blanket flower rocky mountain penstemon silvery lupine prairie coneflower showy fleabane and blue grama grass planted in loose layered drifts that spill softly over the thyme edge whimsical english cottage garden feel abundant romantic airy but intentional and well kept