The English Mustard Growers grow mustard seed for Unilever
for their iconic Colman's mustard brand.
There are two varieties of mustard seed grown.
White mustard seed (Sinapsis alba) and Brown mustard seed (Brassica juncea).
The white mustard seed is named Gedney and the brown mustard seed Sutton,
after local parishes.
The seeds of white mustard add heat and the seeds of brown mustard contribute
pungency to the Colman's mustard.