The Little Shop of Horrors was interested because of "A Bucket of Blood" and said the development process was similar to that of the earlier film, when he and Griffith were inspired by visiting various coffee houses: We tried a similar approach for "The Little Shop of Horrors", dropping in and out of various downtown dives. We ended up at a place where Sally Kellerman (before she became a star) was working as a waitress, and as Chuck and I vied with each other, trying to top each other's sardonic or subversive ideas, appealing to Sally as a referee, she sat down at the table
The Little Shop of Horrors remembers that "When [Welles] and I forgot my lines, I improvised a little, but then I was the writer. I was allowed to." However, Welles states that "Absolutely none of it was ad-libbed [...] every word in "Little Shop" was written by Chuck Griffith, and I did ninety-eight pages of dialogue in two days." According to Nicholson, "we never did shoot the end of the scene. This movie was pre-lit. You'd go in, plug in the lights, roll the camera, and shoot. We did the take outside the office and went inside the office, plugged in, lit and rolled. Jonathan