Norfolk Island Pine Care: Why It Won't Survive Outdoors in Pennsylvania and How to Prune Indoors

Climate Mismatch

Norfolk Island Pine (Araucaria heterophylla) is hardy only in Zones 9–10. Pennsylvania (Zones 5–7) is far too cold. It will die if planted outside.

Indoor Pruning

Do not cut the central leader. Instead, in spring, pinch the soft, light-green tips of new growth (bud pinching) to encourage bushiness. This is a specialized technique—practice on inexpensive plants first.