Unlike the Museums or the Basilica, the Gardens aren't open to walk-in visitors at all — access is only possible as part of an official guided tour, run in multiple languages and typically combined with entry to the Vatican Museums afterward.

Booking ahead matters here more than almost anywhere else

Daily capacity is limited, and tours sell out well in advance during peak travel months — if the Gardens are a priority for your trip, this is one of the first things to book, not the last.