Norfolk Island Pine Dropping Leaves: Light, Water, or Age?

Norfolk Island Pine Dropping Leaves: Light, Water, or Age?

An 8–10 year old Norfolk Island Pine (Araucaria heterophylla), 7–8 feet tall, in a north window, has yellowing, dropping leaves. The owner fertilized regularly, didn’t overwater, but recently repotted into a larger pot and fertilized again—yet leaf drop continues.

Normal Aging vs. Problem

Norfolk pines naturally shed lower branches as they age. If new top growth roughly matches the loss, it’s normal.

Likely Causes of Excessive Drop

• Light: North window is okay only if the tree is right against the glass, curtains always open. If light hasn’t changed, this is less likely.
• Watering: The most common culprit. Over- or under-watering both cause root dieback and identical symptoms. Root rot develops slowly, out of sight.
• Repotting/Fertilizing: Neither fixes light/water issues; both can worsen stress.

Correct Watering

If properly potted (snug pot), water thoroughly when the top quarter of soil is barely damp. If the pot is too large (common), the soil stays wet too long—root rot is probable. Let the soil dry deeper before watering.

For guides on watering, repotting, and Norfolk pine care, email wcreed@HorticulturalHelp.com.