The general populace of Earth was unaware of Groot's existence.
Place of Birth
Unidentified location on Planet X
Tales to Astonish #13 (1960)
Groot recently returned to space and was selected by the Kree to be a part of Star-Lord’s team in the event known as the Annihilation Conquest. Groot and Star-lord would eventually defeat the menace known as the Phalanx, however in doing so Groot would sacrifice his life. The cosmic crusader Rocket Raccoon took a branch of Groot and planted it in a pot and the allowing the hero to re-grow. While in space Groot’s only words spoken were “I am Groot”.After the defeat of the Phalanx, Groot joined the Guardians of the Galaxy a proactive peacekeeping team assembled by Star-Lord. As a member of the Guardians Groot has battled the likes of Blastaar the living bomb-burst, the Badoon, the mighty Shi'ar, and the Inhumans. While in the company of Maximus of the Inhumans it was determined that Groot was really speaking in a clear dialect, but due to his strange physical make up. His larynx and vocal cords are stiff and inflexible