Up to 73% of US lettuce comes from California, being distributed nationwide through extensive retail chains. Lettuce grown in Florida accounts for 3% of the national total and has a unique market window during the winter months. Traditionally, Florida lettuce has been grown between October and April in the rich muck soils of the Everglades Agricultural Area (EAA), just south of Lake Okeechobee.
Recent advances in technology and changes in consumer preferences have seen the Florida lettuce industry expand into emerging production systems, with at least 240 operations occurring in controlled environments such as greenhouse hydroponic systems.
Source: produceprocessing.net