In Bodas de Sangre, Acto 2 (Blood Weddings) by Federico Garcia Lorca, the inclusion of the orange blossom as part of the nuptial ceremony in Act II is a symbol of taking wedding vows.  In the Victorian Era, orange blossoms were the symbol of fertility, but in general, there are more meanings and symbols represented by this flower according to the Book of Symbols:

a) innocence   b) chastity   c) eternal love   d) marriage, and

e) fruitfulness.

It would be the elements of a perfect marriage or what would make a perfect blissful connection during those days (and now). For the complete book of Symbols, click on the link provided.