@Newbii & @no168_92
The reason for the Anime being different and ahead of this is because the Anime adapted the Light Novels and not this Manga (which is also adapting the LN's).
And before you ask, I've only been able to find the Web Novels online (you can find them over at Novel Updates)
@mrmm
It was early considered a medicinal herb and honestly lacked the versatility of Wheat at the time (being able make bread out of it as one example) and depending on where you look it, didn't really become a staple food till about the 1500's.
Let alone Wheat existed throughout Europe for at...