When I start a seasonal series the first thing I do is take the plate I am working with to my local fabric store to see what colors complement it and jump start my ideas. I usually find one or two patterns that I want to work with, since making all the tablecloths by hand is just too daunting time-wise. In Lisa's case I found this canvas stripe that looks good with her dishes, and suggests summer to me, but I wanted to make summer myself so I could incorporate dragonflies into the design. I bought the canvas anyway and used it to make a bonus setting in the series, layering it over the same gray under cloth that I used for winter. The clean simplicity of the stripes is a fun change from the dense patterning of the other settings, but needs a jolt of color to spark it. Red geraniums offer the required brightness, while retaining the unstudied simplicity of the cloth. I put the flowers in white planters to echo the white centers of the plates and add to the clean, breezy feeling.
This cloth could work for any season by changing the color of the napkins and the centerpiece. Again, clicking on the pictures makes them look better.