Norfolk Island Pine yellow leaves

Some oldest inner foliage can yellow and shed. Yellowing through branch tips or the central leader is more concerning than a little interior loss.

Check drainage and drying

Rewet a dry root ball evenly; remove standing water from a wet pot. Water when the upper layer begins drying, while the center still holds some moisture. Bright light away from heating vents and cold drafts supports the remaining foliage.

If yellowing spreads with persistent wilt in wet soil, inspect roots. Remove loose dead needles gently, leaving green branchlets and the leader. The tree does not quickly replace lost lower branches.