If the soil dries, the top will begin to turn yellow and die back. The rhizomes will survive and regrow if they don't dry for too long, but the plant will not bloom again until it has regrown the top again. It will bloom more prolifically if allowed to become pot- bound, that is to fill the pot and have rhizomes pressed against the side of the pot. It is possible for these rhizomes to split plastic pots as they become pot-bound. In that situation the plant may be repotted or divided and repotted.
Adequate light is important.
Full sunlight is not needed, but bright dappled light is needed. In too shady a location, flowers will be fewer and less frequent. You may have to search somewhat to find the plant, but it is available through several garden catalogs. Good luck and enjoy the perfume.