I'm not sure, im guessing:USA
My answer is Canada which produes 90% of the Mustard Seed in the world and is used in France and other european countries.
The US
Ohio
Nevada.
Kentucky.
Texas
Michigan
Mustard seed is a spice and mustard is just a mustard seed concoction.
The state of Washington produces nearly half of the US supply of apples.
The state of Washington produces nearly half of the US supply of apples.
California!
South Carolina
North Carolina