Good quality saffron can be kept for 2-3 years, but poor quality saffron deteriorates rapidly.So it is important to buy the best quality from a reliable source.
Saffron must be protected from dampness and direct light to retain its properties.
With genuine saffron one must soak the filaments for few minutes in warm water or milk before the strong colour, aroma and flavour emerge.
Beware of cheap saffron. It is advisable only to purchase reknowned brands.