Tiger lilies are also very fragrant.
Late season Asiatic lillies.
'Lord Baltimore' perennial hisbiscus puts up tall stalks in May with these dinner plate size flowers in June.
How's this for fireworks?
Red Amranthus, started from seed each spring begins it's show in late June and early July. The red beard-like flower spikes can get quite large.
Wheat Celosia variety 'Flamingo' which can reach four feet tall and wide with these interesting pink "candles" or flowers that attract butterflies and spread seeds.
See the full calendar of Lowcountry garden favorites here.