What do lemons represent?

Clyde had hoped the lemons would be the key to his salvation as a vampire, but this does not turn out to be the case when temptation in the form of Fila proves to be too much. Lemons are grown on groves and farms in Sorrento, Italy, where Clyde and his wife now live as reformed vampires. Lemons are one of the few foods that can truly help Clyde and Magreb’s hunger as vampires –but even the lemons do not last forever as their old hunger pangs for blood come back.