People often use the slow-growing Norfolk Island pine as a living Christmas tree, frequently decorated with ribbons or ornaments. All too often, the tree is discarded after the holiday season, but it can easily be kept as a permanent foliage plant indoors or planted outdoors when it warms up in the spring. CARE Like most easy houseplants, Norfolk Island pines prefer a well-drained soil and don't like to be over-watered. If the tips of the branches get brown, it's a sign to add water. They like humidity, too, so it's a good idea to spray your plant every couple of days or place it in a room with higher humidity. GROWTH HABIT Norfolk Island pine is not an actual pine tree at all! Growing to great heights, it has a straight trunk and pleasingly symmetrical branches covered with short, inward-curving needles. A Norfolk Island pine can grow big—up to 200 feet tall outdoors. Grown indoors, it gets 3 to 8 feet tall or may even be trained as a bonsai or miniature tree. TOXICITY Norfolk Island pine poisoning in cats is a toxicity caused by ingestion of the tree's needles or water source. The exact toxic principles of the Norfolk Island pine are unknown, but consumption of this tree have been known to cause gastrointestinal upset and dermatitis in cats. Protect yourself and your pet.