Coriander powder is derived from the seed of the coriander plant. Most commonly, Coriander powder is made from freshly roasted coriander seeds. it is bought as whole dried seeds and ground as and when needed, but it can also be found as a readymade powder. Ground coriander the same as coriander powder technically the same because they both come from the same plant. However, they are also not the same because they both have different uses and flavors. Coriander is an aromatic spice, with a sensually musky scent that is punctuated by a twang of citrus.Properly stored, ground coriander will generally stay at best quality for about 3 to 4 years. To maximize the shelf life of ground coriander purchased in bulk, and to better retain flavor and potency, store in containers with tight-fitting lids.