Norfolk Island pine is not an actual pine tree but rather a relative of the monkey puzzle tree. It is often cultivated as a landscape tree in subtropical climates in North America (USDA zones 10 to 11) and grown indoors elsewhere. 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.