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 with us, and the three of us worked out the rest of the story together. The first screenplay Griffith wrote was "Cardula", a Dracula-themed story involving a vampire music critic. After Corman rejected the idea, Griffith says he wrote a screenplay titled "Gluttony", in which the protagonist was "a salad chef in a restaurant who would wind up cooking customers and stuff like that, you know? We couldn't do that though because of the code at the time. So I said, "How about a man-eating plant?", and Roger said, "Okay." By that time, we were both drunk." Jackie Joseph later