persian limes are less acidic than key limes and do not have the bitterness that lends to the key lime's unique flavour. persian limes are sold primarily in six sizes, known as 110's, 150's, 175's, 200's, 230's and 250's. they are grown primarily in florida in the u.s. the persian lime became more important when key lime orchards were wiped out by a hurricane in 1926. persian lime orchards themselves were devastated by hurricane andrew in 1992. large numbers of persian limes are grown, processed and exported every year primarily from martínez de la torre, veracruz, mexico, to the american, european and asian markets. u.s. persian lime imports from mexico are handled mostly through mcallen, texas.