Increasing the humidity around your Norfolk Island pine (Araucaria heterophylla) can help it hold on to its lower branches-for a while. When growing in their indigenous home in the South Pacific, these plants naturally shed their lower branches as they mature. You should expect your plant to lose some branches, but setting the pot on top of a tray of pebbles and water or using a room humidifier might slow the process. Many people decorate these trees during the holidays. If you do, avoid using lights, which can dry out the tree, or hanging ornaments, which cause the branches to droop. Also avoid allowing the soil to dry too much. Dry conditions may lead to branch drop, too.