I put lilyturf in the pots instead of the standard spike. Lilyturf is usually used for a ground cover, which must mean it spreads. It flowers in the late summer. I put in the usual geraniums, and a few snapdragons. Snapdragons were my grandpa's favorite flower. I also added some cute little dahlias to some of the pots, some salvia, some nicotiniana, and some coleus. I used a variegated ivy in a few pots for a trailer.
I bought a new book on companion planting, Great Garden Companions by Sally Jean Cunningham, at Schuler bookstore in Grand Rapids, and read through it on the ride back from Michigan. She suggests "mixing it up" and intensively planting in the garden, mixing herbs, flowers and vegetables all throughout the garden to provide a "living mulch", shading out the weeds, and to provide flowering plants to attract beneficial insects.
So, yesterday I planted nasturtium seeds next to the cucumbers (they're up!) and fennel near the zucchini, and thyme in the cabbage. Luckily, I already had chives planted, and volunteer dill is sprouting among the lettuce. I won't tear it out. We'll see how it all works together.