The first episode of "I Am Groot," which is called "Groot's First Steps," gives us a major hint at where the series falls within the MCU timeline. The show begins with Groot as a sapling. You may remember that, in "Guardians of the Galaxy," Groot first appears as an adult, but when he sacrifices himself to save his friends, all that's left of Groot is a broken twig. Rocket takes the twig and puts it in a potted plant, and Groot is able to sprout once again. Since this episode shows Groot waking up in his potted plant and taking his first steps, that means the show picks up shortly after the first Guardians movie. However, later episodes appear to take place after the second film and before "Avengers: Infinity War."
