The Secret Life of Plants is a 1979 documentary film directed by Walon Green and based on the book of the same name. It featured the Stevie Wonder soundtrack Journey through the Secret Life of Plants.
The film made heavy use of time-lapse photography (where you can see plants grow in a few seconds, creepers reaching out to other plants and tugging on them, mushrooms and flowers popping open, etc.), in order to portray them as animate beings. When the film was released, such images were a novelty to the general public.