Fertilising guide
How to fertilise Wollemia Pine (Wollemia nobilis)— schedule & NPK
Also called Wollemi pine, dinosaur tree.
More about wollemia pine
About Wollemia Pine
Wollemia nobilis · also called Wollemi pine, dinosaur tree · edible
The Wollemi pine is a 'living fossil' conifer in Araucariaceae, rediscovered in 1994 in a remote Australian canyon. Not a true pine, it bears edible seeds in cones like its monkey-puzzle relatives. It grows well in pots or sheltered mild gardens, needing acidic, moist, well-drained soil, dappled light and protection from hard frost and root rot.
Growth habit: Evergreen coniferous tree, often multi-leadered, with distinctive 'bubbly' bark and pendulous fern-like branchlets.
What fertiliser wollemia pine actually wants — and why
Wollemia Pine is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for wollemia pine: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed wollemia pine, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For wollemia pine:
Feed in spring and summer with a balanced slow-release or ericaceous-friendly fertiliser at a moderate rate; avoid overfeeding. Container plants benefit from an annual top-dress and repotting every 2-3 years. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
The dormant-season rule matters more than the exact interval: skip feeding entirely when wollemia pine is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for wollemia pine
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for wollemia pine. The variable that actually matters is pH, not concentration.
Feeding always goes onto already-damp soil, never dry roots — water wollemia pine first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the wollemia pine watering schedule.
Signs you are over-feeding wollemia pine
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for wollemia pine:
- Brown, scorched leaf margins from too strong or too frequent a dose.
- White salt crust on the soil surface.
- Soft, lush growth that fruits or flowers poorly.
Signs you are under-feeding wollemia pine
- Yellowing leaves with green veins (iron chlorosis from high pH).
- Weak growth, poor cropping and an overall pale, stressed look.
- Stunted new shoots in spring despite adequate water and light.
If the symptoms point at watering, light or roots rather than nutrition, the full wollemia pine care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush wollemia pine with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Organic vs synthetic feeds for wollemia pine
Organic options
Composted pine bark, pine-needle mulch, used coffee grounds and an organic ericaceous feed gently maintain acidity. UK: Vitax or Westland Ericaceous; US: Espoma Holly-tone or Dr. Earth Acid Lovers. Slow, soil-improving, hard to overdo.
Synthetic / liquid feeds
A liquid or granular ericaceous feed — UK: Miracle-Gro Ericaceous, Vitax or Westland; US: Miracle-Gro Acid-Loving Plant Food or Espoma Holly-tone. Pair with rainwater and an acidic mulch for it to work.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising wollemia pine — frequently asked questions
What fertiliser does wollemia pine need?
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves. Wollemia Pine is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
How often should I feed wollemia pine?
Feed in spring and summer with a balanced slow-release or ericaceous-friendly fertiliser at a moderate rate; avoid overfeeding. Container plants benefit from an annual top-dress and repotting every 2-3 years. Feed in spring and summer with a balanced slow-release or ericaceous-friendly fertiliser at a moderate rate; avoid overfeeding. Container plants benefit from an annual top-dress and repotting every 2-3 years. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
What strength of feed for wollemia pine?
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for wollemia pine. The variable that actually matters is pH, not concentration.
What does over-feeding wollemia pine look like?
Brown, scorched leaf margins from too strong or too frequent a dose. White salt crust on the soil surface. Soft, lush growth that fruits or flowers poorly. Feeding wollemia pine an ordinary fertiliser, or growing it in hard tap water / limey soil, is the defining mistake — it triggers lime-induced chlorosis (yellow leaves, green veins) no amount of feeding fixes until the pH comes down.
Should I flush the soil of wollemia pine?
Flush wollemia pine with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Keep reading
- Wollemia Pine care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water wollemia pine — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise tomato
- How to fertilise pepper
- How to fertilise cucumber
- All 5561 fertilising guides in the Growli library