Saffron is a perennial plant that has onions. This onion has a brown pod. It grows in southwest Asia, southern Spain and southern Europe It has six purple stems and three red stigma petals. The used part of the saffron plant is the orange stigma of its flowers. Saffron stigma contains fat, minerals and mucilage. Saffron propagation is exclusively common to the ground corm. The scent of saffron.