This song is about being a state in which the beauty of the world around only hurts you. He's looking at how vibrant the blossoms in the jacaranda trees are and he can't appreciate them because their beauty only wounds him. So he's going to Alaska where things are simpler, because there you have to fight to survive and there are legit things to hurt you, such as polar bears and the cold. Where he is now there's too much history ("old blood and relatives") and it's too complicated ("everything is growing in a thousand different ways"), but in Alaska he would have a clean slate.
This song is about being a state in which the beauty of the world around only hurts you. He's looking at how vibrant the blossoms in the jacaranda trees are and he can't appreciate them because their beauty only wounds him. So he's going to Alaska where things are simpler, because there you have to fight to survive and there are legit things to hurt you, such as polar bears and the cold. Where he is now there's too much history ("old blood and relatives") and it's too complicated ("everything is growing in a thousand different ways"), but in Alaska he would have a clean slate.