Calycanthus floridus, commonly called Carolina allspice, is a dense, rounded deciduous shrub with a suckering habit which grows 6-9' (less frequently to 12') tall with an equal or slightly greater spread. Features very fragrant, brown to reddish-brown flowers (2" across) which bloom at the ends of short branchlets in May.
Provide the plant with a moderate amount of water, because even though it can tolerate drought, Calycanthus floridus prefers moist soil. Increase your watering frequency during the heat of summer.
Mature plants don't require fertilizer. By fertilizing young shrubs you can increase both the size and the amount of flowers on the plant.
To shape the plant and to keep it from growing excessively in size, prune it immediately after flowering.