Terence Young and Euan Lloyd worked for free while all of the big-name cast members were paid one dollar for their work.
Grace Kelly's only completed movie since retiring from the screen in 1957. She was also a front runner for Marnie (1964) (for her favorite director, Sir Alfred Hitchcock) and, at the time of her death, was preparing an official comeback with the never-completed 1982 drama Rearranged (1982), which would have paired her with Edward Meeks and Robert Dornhelm.
The United Nations Secretary General asked Xerox to sponsor this production for the U.S., which it did. The on-screen credit says: "This film was produced as a public service through funds provided by the XEROX CORPORATION".
This movie was promoted on U.S. television under the title "The Poppy Is Also a Flower", but when it was actually shown, the on-screen title was "Poppies Are Also Flowers".