Some varieties of orchids bloom just once a year, some several times a year and others continuously. The orchid family is the largest plant family, and orchids bloom at various times and frequencies.
Blooms of the genus Cattleya can last up to four weeks; and, blooms of the genus Phalaenopsis can last from one to four months. Some species of orchids are practically immortal; there are divisions of orchids discovered in the 19th century still flowering today.
Some orchids are fragrant, while others have no scent. Some common scents of orchids include raspberry, coconut, lilacs or citrus, but some orchid scents defy description. An orchid's scent can be so powerful that it perfumes an entire living room or greenhouse.