I'm making lists while the weather is not conducive to working outside. It's like a steambath, the humidity is so high. Next year's beds will have the following, with more intensive plantings:
Verbena bonariensis, Salvia coccinea, Zinnias, Alternanthera, both red and chartreuse. The red is just starting to show color, will be vivid red soon.
Scott Ogden's book on Bulbs for the South and Christopher Lloyd's book on Succession Planting have given me ideas for putting bulbs that bloom in different seasons in one bed: Early bulbs like Hyacinths and Narcissus, followed by Amaryllis, then Agapanthus. In the fall Lycoris blooms with bare stems and the foliage that follows stays green all winter. There are others that could be tucked in there, too.