Trade and use of saffron 93.7 percent of the year's global total mass; much of the Iranian crop was bound for export. In the same year, second-ranked Greece produced . Morocco and Kashmir-India: Most of the region's saffron is grown in the more climatically suitable "Valley of Kashmir", which is in Indian state of Jammu and Kashmir ; region of Kashmir, tied as the next-highest producer, each produced . In decreasing order, Iran, Greece, Morocco, the Kashmir (Jammu and Kashmir-India), Azerbaijan, Spain, and Italy dominate the world harvest. In Iran, the world's leading producer, the erstwhile and northeasterly Khorasan Province, which in 2004 was divided
Trade and use of saffron well-to-do monks wore a long linen undershirt known as a "léine", which was traditionally dyed with saffron. In histology the hematoxylin-phloxine-saffron (HPS) stain and Movat's pentachrome stain are used as a tissue stain to make biological structures more visible under a microscope. Saffron stains collagen yellow. There have been many attempts to replace saffron with a cheaper dye. Saffron's usual substitutes in food—turmeric and safflower, among others—yield a garishly bright yellow that could hardly be confused with that of saffron. Saffron's main colourant is the carotenoid crocin; it has been discovered in the less tediously harvested—and hence less costly—gardenia fruit.