Weddings in the Rose Garden requires a permit from the City and can be a complicated, time consuming and drawn out process to obtain one.
There are lots of rules, and is very expensive for the short time you have access.
There are restrictions on microphones, music, and amplified sound. You cannot have tables or canopies. It can be very hot in the sun and all weddings must be “al fresco” so you’ve got to speak up when you say “I do”. No musicians are allowed. No food can be served.