Outdoors, a new tree can be a big investment, but easy indoor trees can make affordable yet eye catching houseplants for beginners. The secret to keeping pine Araucaria heterophylla healthy indoors is to give it bright but indirect light. In low light, the lower branches tend to turn brown and fall off. This plant is soft texture adds a cozy, woodsy feeling to a room. It is especially cute when decorated for Christmas. Allow the soil surface to dry between waterings.