Due to the Diaspora, citron trees appeared in Southern Europe (Spain, Greece, Italy), as well as in North Africa and Asia Minor.
The spread of information about citron cultivation is attributed to the Roman historian and writer Pliny the Elder, who described the fruit (he called it nata Assyria malus) in his book Natural History.
From the Middle Ages comes Ibn al'Awwama's 12th-century agricultural encyclopedia, The Book of Agriculture, which contains an article on citron tree cultivation in Spain.
