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
Saffron per gram, given the wide possible range of colouring strengths that different kinds of saffron can have. Despite attempts at quality control and standardisation, an extensive history of saffron adulteration, particularly among the cheapest grades, continues into modern times. Adulteration was first documented in Europe's Middle Ages, when those found selling adulterated saffron were executed under the "Safranschou" code. Typical methods include mixing in extraneous substances like beetroot, pomegranate fibres, red-dyed silk fibres, or the saffron crocus's tasteless and odourless yellow stamens. Other methods included dousing saffron fibres with viscid substances like honey or vegetable oil to increase their weight.