Saffron (trade) by far the world's most important producer: in 2005 it grossed some of dry threads, or 93.7 percent of the year's global total mass; much of the Iranian crop was bound for export. Northeasterly Khorasan Province, which in 2004 was divided in three, grows 95 percent of Iranian saffron: the hinterlands of Birjand, Ghayen, Ferdows in South Khorasan Province, along with areas abutting Gonabad and Torbat-e Heydarieh in Razavi Khorasan Province, are its key cropping areas. During 2004, Iran was not a member of the World Trade Organization. and still until November 2009, Iran was again not a member of
History of saffron the family Iridaceae, native to Greece and Crete. "C. cartwrightianus" is the presumed wild progenitor of the domesticated triploid "Crocus sativus" – the saffron crocus. Saffron is the triploid form of a species found in Eastern Greece, "Crocus cartwrightianus"; it probably appeared first in Crete. An origin in Western or Central Asia, although often suspected, has been disproved by botanical research. Saffron played a significant role in the Greco-Roman pre-classical period bracketed by the 8th century BC and the 3rd century AD. The first known image of saffron in pre-Greek culture is much older and stems from the Bronze Age.