If you're unable to get some from a 300-year-old Italian lemon tree plantation like Munno does, leaves from a local lemon ...

To do this, find an actively growing but slightly matured shoot on a lemon tree and cut a small section just below the leaf.

"Limoncello is a very traditional Italian liqueur ... a villa on the Amalfi Coast in the city of Vietri with 600 lemon trees. Villa Divina supplies lemons to Pallini, a company established ...