Norfolk Island pine leaves turning yellow: causes and what to do
17 results in the diagnosis tree begin with yellowing leaves, 7 of them marked likely when the answers fit. They are ordered here for Norfolk Island pine (Araucaria heterophylla), using what its sources say about soil moisture, light, soil, watering and feeding and one problem recorded for it.
Sources last read 14 September 2026.
Araucaria heterophylla is a species of conifer. As its vernacular name Norfolk Island pine implies, the tree is endemic to Norfolk Island, an external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia. Wikipedia, CC BY-SA 4.0
Native range: Norfolk I. (incl. Philip I.) (wet tropical). Also sold as Australian Pine, house pine, Living Christmas Tree, Norfolk Island Araucaria, Norfolk Pine and Polynesian Pine.
What Norfolk Island pine’s sources say that bears on this
- Soil moisture
- Moist but well-drainedRHS · read 13 September 2026
- Light
- High lightClemson Extension · read 13 September 2026Full sun, Partial shadeRHS · read 13 September 2026
- Soil
- Chalk, Loam, Sand; pH Acid or Alkaline or NeutralRHS · read 13 September 2026
- Watering
- From spring to autumn water regularly, but avoid overly wet soil. In winter, water sparingly and mist the plant in heated rooms.NC State Extension · read 13 September 2026From March to September, the growing season, water generously; over winter keep the compost just moist.RHS · read 13 September 2026
- Feeding
- From spring to fall, dilute liquid fertilizer can be given every week or every two weeks.NC State Extension · read 13 September 2026Feed every two weeks with a balanced fertiliser while the plant is growing; do not feed in winter.RHS · read 13 September 2026
How this shows up on a Norfolk Island pine
The older part of the canopy yellows while the compost stays soaked
Whole leaves yellow at once rather than browning at a margin, and the Norfolk Island pine looks deflated despite soil that has not dried since it was watered.
Water held around the roots for days leaves them without air, and a root without air stops working within a week. Its source describes moist but well-drained soil for good reason.
Telling it apart: Lift it from the pot. Firm pale roots mean the water is not the problem; brown soft ones that smell sour mean it is.
RHS · read 13 September 2026Possible causes, likeliest first for a Norfolk Island pine
Most likely too much water
Ranked higher because Norfolk Island pine's recorded problems point this way.
- Moist but well-drained RHS · read 13 September 2026
- Chalk, Loam, Sand; pH Acid or Alkaline or Neutral RHS · read 13 September 2026
Why: Soil that is wet two inches down, under leaves that are yellowing from the bottom or falling, points at roots that cannot breathe.
What to try:
- Hold off watering until the top two inches of soil are dry, and check again with a finger rather than by the calendar.Useful: moisture meter
- Empty any water standing in the saucer or the outer pot within half an hour of watering.Useful: pot with drainage holes
What would settle it: Lift the norfolk island pine out of its pot. Healthy roots are firm and pale; roots that have been wet too long are brown, soft and smell sour.
Most likely not enough light
Ranked higher for Norfolk Island pine because of what its sources say.
Its sources place this plant in full sun or high light, which makes a shortage of light a strong explanation indoors.
- High light Clemson Extension · read 13 September 2026
- Full sun, Partial shade RHS · read 13 September 2026
Why: Far from a bright window, a norfolk island pine builds leaves it cannot afford.
What to try:
- Move it closer to the brightest window you have, over a week or two rather than in one step.Useful: grow light
- Water less while it is in low light; a norfolk island pine that is barely growing uses little.
What would settle it: Compare a new leaf with one from last year. Smaller and paler, with a longer gap below it, is the reaching pattern rather than a nutrient one.
Most likely too little water
- Moist but well-drained RHS · read 13 September 2026
Why: Soil dry two inches down, under lower leaves that are yellowing or leaves that are falling, is a norfolk island pine shedding what it cannot support.
What to try:
- Water until it runs from the drainage hole, then let the pot drain.Useful: pot with drainage holes
- If the water runs straight through a shrunken rootball, stand the pot in water for twenty minutes so the compost can take it up.
What would settle it: Water it thoroughly and look again the same evening. A thirsty plant firms up fast. One that does not has a root problem rather than a water problem.
Less likely for a Norfolk Island pine, still possible
- Most likely short of nutrients
- Most likely a build-up of salts in the soil
- Most likely cold
- Nutrients are an unlikely explanation here
- Possibly root rot, in a pot that has stopped draining
- Probably too much water, but this is not settled
- Probably too much water
- Light and feeding are both plausible, and this does not separate them
- This may be ordinary leaf loss
- Possibly dry air
- The answers do not point at one cause
- Possibly too much direct sun
- Possibly too much direct sun, or feeding
Questions
- What usually causes yellowing leaves on a Norfolk Island pine?
- For Norfolk Island pine: most likely too much water, most likely not enough light and most likely too little water.
- How can I tell which one it is on my Norfolk Island pine?
- Where is the yellowing? The lowest leaves, working upward; New growth at the top, while older leaves stay green; Between the veins, the veins themselves still green; At the leaf tips and edges, browning as it goes; Patchy, only on the side facing the window.
- What do Norfolk Island pine's sources say about its soil moisture?
- RHS: Moist but well-drained.
- What does this look like on a Norfolk Island pine?
- Whole leaves yellow at once rather than browning at a margin, and the Norfolk Island pine looks deflated despite soil that has not dried since it was watered. Telling it apart: Lift it from the pot. Firm pale roots mean the water is not the problem; brown soft ones that smell sour mean it is.
Other plants that show yellowing leaves
AvocadoYellowing that begins at the leaves deepest inside the canopy
Chinese banyanFaded, yellow-white areas on the sunny side of the canopy
Coffee plantPale dry areas across the upper leaves only
Common figThe leaves deepest inside the canopy turn yellow and hang
Crape myrtlePale dry areas across the upper leaves only
Japanese mapleYellowing that begins at the leaves deepest inside the canopy
Something else wrong with the Norfolk Island pine?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.