During the growing season gingers all need to be kept consistantly moist, but not standing in water. Most gingers prefer moderate to high humidity during the growing season, but they can tolerate drier air during the winter. Throughout the growing season feed them once a month with a balanced water soluble fertilizer such as Bachman's Excel Gro. While they are in bloom, increase the frequency to every 2-3 weeks. Most species of ginger should be potted in a high quality, soil-based potting soil such as Bachman's Exeloam.
All gingers respond well to being repotted in the spring.
The most they should ever need is an occasional light shower to wash the dust from their leaves. Cut off spent blooms when they no longer look good. Avoid using leafshine products on gingers. It can damage their leaves and blooms. The easiest way to propagate gingers is by division of the plants when their growth resumes in the spring.