Elettaria cardamomum, commonly known as green or true cardamom, is a herbaceous, perennial plant in the ginger family, native to southern India. It is the most common of the species whose seeds are used as a spice called cardamom. It is cultivated widely in tropical regions and reportedly naturalized in Réunion, Indochina, and Costa Rica
The three natural varieties of green cardamom plants are:
- Malabar (Nadan/native), as the name suggests, is the native variety of Kerala. These plants have floral racemes (which bear the pods) that grow horizontally along the ground.
- Mysore, as the name suggests, is a native variety of Karnataka. These plants have floral racemes which grow vertically upwards. The Mysore variety has declined, however, in the past few decades owing to the emergence of the more resistant and better-yielding ‘Green Gold’ variety, and which is the most common form of cardamom harvested in Kerala.
- Vazhuka is a naturally occurring hybrid between Malabar and Mysore varieties, and the panicles grow neither vertically nor horizontally, but in between.
Recently, a few planters isolated high-yielding plants and started multiplying them on a large scale. The most popular high-yielding variety is ‘Njallani’, which is a unique high-yielding cardamom variety developed by an Indian farmer, Sebastian Joseph, at Kattappana in the South Indian state of Kerala. K. J. Baby of Idukki District, Kerala, has developed a purely white-flowered variety of Vazhuka type green cardamom having a higher yield than ‘Njallani’. The variety has high adaptability to different shade conditions and can also be grown in waterlogged areas.