It is a challenge to replicate an effect using plants that will grow in our southerneastern zone 8b. Here are some of the substitutions I make.
Lilacs: substitute Loropetalums. Crape Myrtle is often suggested, but Crepes bloom mid-summer. Neither of these suggested substitutes have the fragrant effect of lilacs, however.
Tulips: Iceland poppies for early, Hippeastrum for late combos.
Sedum Acre with Laura Bush Petunias
Alchemilla mollis (Lady’s mantle) –- For chartreuse color effect use: Margarita sweet potato vine, Lime mound spirea, Sedum acre, Alternanthera ‘Chartreuse,' Duranta.
Campanula (bellflower): use Ruellia instead
Native BaptistaLupine: Baptisia
Primula: substitute Violas, winter to spring.
Native azalea 'Alabamense' from Neel GardenRhododendron: Clerodendrum bungei is a summer substitute. Native azaleas, also in the Rhododendron family are good spring alternatives. Camellias are another substitute if a large shrub is needed.
This for That, from Schoolhouse Rock: