Domestic mustard seed: Classes

Domestic mustard seed is classed as yellow, brown or oriental, or mixed. The class forms part of the grade name; for example, Domestic Mustard Seed, Sample Canada Yellow Account Heated.

Identifying classes of domestic mustard seed
Class Colour Approximate size Shape Surface
Yellow Light creamy-yellow to yellow; occasional seed is light or yellowish brown 2 to 3 mm in diameter Spherical or oval Textured, similar to an orange peel, hilum area–small white spot on a deep yellow to light tan circular area
Brown Reddish-brown to dark-brown 2 mm or less in diameter Spherical or oval Predominant netting, ridges are thicker than oriental mustard, hilum area – white on a black or darker brown circular area
Oriental Predominantly yellow to dark-yellow, with some seeds ranging from light brown to brown 1.2 to 2.0 mm in width, 1.6 to 3.0 mm in length Oval Predominant netting, not as predominant as brown mustard, ridges are fine, hilum area – white on a darker yellow to lighter brown circular area
Mixed Yellow and brown mustard seed containing less than 90.0% of one class. See also Domestic mustard seed, oriental: Other classes