Native to India, lemon grass can be grown in any hot, moist climate in sandy, well-drained soil. In the United States it is grown in Florida and California, but can be greenhouse grown anywhere with proper temperature and humidity. Because of its fibrous, sinewy structure, the lower bulb of the lemon grass is normally cut into small sections of stalk and "bruised" or crushed before adding to a dish.
Kaffir lime leaves are native to Southeast Asia, and exhibit a "double leaf" look not unlike an elongated figure-eight. Like most citrus leaves, they are dark green, smooth and glossy. While widely used in Thai cuisine, kaffir lime leaves are used in many Southeast Asian foods, and are often paired with lemon grass and ginger to form an Asian equivalent of the French mirepoix or Creole Holy Trinity.