The details of Galadhon's life are almost completely unknown, and we have no specific account of his birth or death. He belonged to broadly the same generation of Elves as Lúthien, so it is assumed that, like Lúthien, Galadhon was born during the Years of the Trees. The timeline above shows Galadhon perishing during the Ruin of Doriath. There is no direct evidence to corroborate that date, but the absence of any later reference to Galadhon hints that he died at some point before the end of the First Age.

In earlier versions of Tolkien's work, Galaðon is a name or title given to the Vala Oromë, later abandoned in favour of Aldaron, 'Lord of Trees'. Apart from the obvious 'tree' connection, this seems to be mere coincidence.