Saffron and saffron are not the same plant, there is a big difference between the two, saffron is also known as crocus, saffron, for the iris family of perennial herbs, propagated by bulbs. Saffron is an annual herb of the Asteraceae family, propagated by seed. Saffron and saffron both have the effect of activating blood circulation and removing blood stasis and relieving menstruation and pain, but saffron has significant medicinal effects and is more valuable. Saffron is native to the Mediterranean, with the highest yield in Spain, China has been introduced to the successful areas of Jiangsu, Zhejiang, Shandong, etc. In addition, Fujian, Guangxi, Beijing, Tianjin, Henan also has a small amount of planting. Many places have introduced the failure of planting, more and more planting less and less lessons. Because it is more stringent requirements for environmental conditions, like cool and humid climate, afraid of drought, afraid of heat, like light, cold, avoid stagnant water. In different stages of growth and development, and require different environmental conditions. It is in the form of bulb "dormant" through the dry and hot summer, and then in the cool fall and mild and humid winter flowering growth. New bulbs form in the spring and return when temperatures rise.