Follows the tradition of its predecessors by having its female lead character(s) named after flowers. The first film had Ivy, the second, Lily, the third, Violet and this film had Daisy and Azelea.
The Latin motto of the Ivies, 'Concordia Res Parvae Crescunt', means 'Small things grow through harmony'.
The title was stylized as Poison IVy: The Secret Society because "IV" is the roman numeral for four. It is the fourth film in the series.