|Everglades Agricultural Area, Fla., grown romaine lettuce|
Another way to tell is by taste. It will be saltier than greens grown in other areas of the country.
Other crops grown in the EAA are green beans, carrots, potatoes, beets, sweet corn, rice, and sugar cane.
If you want to see the black soil for yourself, take a ride west on Southern Boulevard past the City of Wellington. When you get to the sugar cane fields, stop and look down to see the black gold of the EAA.