Cymbidium orchids, native to tropical Asia, produce large attractive flowers, popular as both cut flowers and corsages. Cymbidiums are potted plants grown in the home or a greenhouse. Unlike some other orchids, however, cybidiums can tolerate outside conditions, if moderate temperatures prevail. Cymbidiums bloom once each season. The time of bloom depends on the particular variety. Despite the reputation orchids have as being difficult to care for, growing cymbidiums is relatively easy as long as you follow a few simple guidelines.