The flower head can add another two foot to the height of the plant, and sometimes the weight will cause the tall stems to arch slightly.
After the flowers drop, a colorful calyx remains.
As winter approaches the calyx thickens, becomes leathery in texture, and reddish in color. Any flowers that were pollinated develop into round, metallic-blue fruits. I like this stage even better than the flowers.
Clerodendrum indicum is not a fast spreader but over a period of years can outgrow the original planting so it is listed as potentially invasive. During cold winters, the plants will die to the ground but always return to flower by fall, and add some color to the garden into early winter.
Skyrocket, Tubeflower, Turk's Turban, and Bowing Lady are among the many common names for this plant. In this case it seems best to just stick with the botanical name to avoid confusion.
Clerodendrum indicum is native to the Malay Archipelago and recommended for USDA Zones 8-11. Best flowering will be in a full sun to part shade location.