Fan Casting Groot in Marvel animated comic show

Groot was a Flora colossus from Planet X, the capital of the Branchworlds, five gardens of suns and planets created by the Gardener. Groot and his fellow Flora colossi, Tweeg and Gleef, were raised by their parents and the Arbor Masters, who served as teachers, protectors and monarchs. Decades later, into his adulthood, Groot found himself in Kree space, where he was promptly captured and imprisoned. While in jail, he met his cellmate, Rocket Raccoon. Although they didn't get along at first, after several months Rocket stood up for Groot when the Kree Guards kept bullying him for only being able to speak three words. In return, Groot made Rocket a flower bed.