Pot grown trees need to be brought indoors as late as possible. Since they shouldn’t be kept inside your home for more than 12 days(at a time), we recommend bringing your tree inside, the weekend before Christmas. If you want to keep your tree indoors for longer, you can do that, you’ll just need to move your Norway Spruce outside for around 24 hours to recharge, once every week. Once the holidays are over, however, move your tree outdoors with the pot so that it can thrive and continue growing.