The differences between Gospels of Matthew (13:31–32), Mark (4:30–32), and Luke (13:18–19), are minor. In the Gospels of Matthew and Luke, it is immediately followed by the Parable of the Leaven, which shares this parable's theme of the Kingdom of Heaven growing from small beginnings.
The Mustard Seed The plant referred to here is generally considered to be black mustard, a large annual plant up to 9 feet tall,[2] but growing from a proverbially small seed