Although generally thought of as a tropical plant, orchids grow on every continent. The vanilla orchid (and its vanilla bean) is the only commercially grown orchid crop (Vanilla planifolia).Orchids yummy enough to eat and cook with! Some orchid flowers bloom for mere hours, while others last up to half a year. Orchid flowers always grow upside down when mature. Orchid plants can live to be up to 100 years old.