LOL... It’s interesting that they use the word ‘passport’ when many of the people who grow the flowers and decorate the floats do not have one when entering the US.
I don’t know about the actual growing of the flowers, but those of us who were there this week decorating the floats were all-American (Lutherans, Oddfellows, and other volunteer groups). Decorating the floats is a real experience. Afterwards you forget how tedious it is, cutting up tiny petals for hours on end, and volunteer the next year!
I didn’t see your post until after I put up mine and said the same thing, heh.