Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with wheat and the color black) Buckwheat may indicate suspicious money or worry coming because of money.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) It may indicate a man of wealth and sovereignty but corrupt.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) It is interpreted as suspicious money or worry.