Answer: Spireas, barberries and caryopterises are all sun lovers and will do great in your situation. You can plant dwarf cultivars and they should remain small enough not overcrowd the bed. How about some perennials? Salvia elegans (Pineapple sage) flowers summer through fall; Deep red flowers on three foot tall stems.
Aster divaricatus (White Wood Aster) Dark purple flowers in the Summer to Fall of the year. This plant keeps it shape very well. Twelve to twenty-four inch perennial.
Rosmarinus officinalis (Rosemary) has small light blue flowers in spring and periodically through the summer. Evergreen, can be pruned into a small mound or allowed to grow 3-4 feet tall.
Coreopsis verticillata "Moonbeam" (Tickseed) is a low growing perennil with small yellow flowers atop dainty foliage.
There are lots and lots of other possibilities so check to see what's available in your local garden center. Enjoy your garden!
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