Repotting guide

When & how to repot Wollemia Pine (Wollemia nobilis)

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.

Mature size: Up to 25-40 m in the wild; commonly kept to 1-3 m as a long-lived container or patio specimen.

Watch for — Root rot: Susceptible to root rot (including Phytophthora) in wet or poorly drained soil; sharp drainage and care not to overwater are vital.

How to tell wollemia pine needs repotting

Repotting on a calendar is less reliable than reading the plant. For wollemia pine, watch for these signs:

Roots creeping out of the drainage holes or matting tightly across the soil surface.
The rootball dries out within a day or two no matter how much you water.
Water channels straight down the gap between rootball and pot without wetting the centre.
Steady decline — thin growth, persistent crispy edges — that good humidity and watering have not fixed. Only then is the disturbance of a repot worth the risk for wollemia pine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot wollemia pine

Every 1–2 years, disturbing the roots as little as possible. Wollemia Pine's growth habit — evergreen coniferous tree, often multi-leadered, with distinctive 'bubbly' bark and pendulous fern-like branchlets. — sets the pace. 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.

What size pot to step wollemia pine up to

Go up only one size and handle the rootball as little as possible. Wollemia Pine resents root disturbance, so the goal is to slide the intact rootball into slightly more soil — not to tease, wash or prune the roots. A modest step up means less shock and a faster recovery.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot wollemia pine

Early spring, just as new growth restarts, is the ideal window for wollemia pine. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting wollemia pine

Keep disturbance to a minimum. Wollemia Pine resents root disturbance, so the plan is to move the intact rootball — not to wash, tease or prune the roots.
Choose just one size up. Pick a pot only one size larger with drainage, and have moisture-retentive acidic, moist, well-drained soil ready.
Slide the rootball out whole. Water the day before, then ease wollemia pine out keeping the rootball intact. Gently free only the roots that are circling the very bottom.
Nestle it into fresh soil. Add a base layer of fresh mix, set the rootball in at the same depth, and backfill gently around the sides without packing hard.
Water and protect. Water in, then keep it warm, humid and out of direct sun for a few weeks while it re-roots. Expect a short sulk — that is normal.

Aftercare

Expect wollemia pine to sulk for a couple of weeks — that is normal after any root disturbance for this group. Keep it warm, humid and out of direct sun, water just enough to keep the mix lightly moist, and do not panic and overwater while it re-roots. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for wollemia pine

Wollemia Pine wants acidic, moist, well-drained soil. Prefers neutral to acidic soil, ideally pH 5.5-6.5, that holds moisture yet drains freely. A peat-free ericaceous-leaning mix with added grit suits container plants. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting wollemia pine — frequently asked questions

How often should you repot wollemia pine?

Every 1–2 years, disturbing the roots as little as possible for wollemia pine. Repot wollemia pine every 1–2 years, disturbing the roots as little as possible — it sulks for weeks if the rootball is teased apart. Slide it into one size up in spring with fresh acidic, moist, well-drained soil, keep it warm and humid afterwards, and never bare-root or hard-prune the roots.

What size pot does wollemia pine need?

When is the best time of year to repot wollemia pine?

Why does wollemia pine sulk after repotting?

Wollemia Pine resents root disturbance, so a wilt or stall for a week or two after repotting is normal, not a failure. Minimise it by keeping the rootball intact, stepping up just one size, and keeping the plant warm, humid and out of direct sun while it re-roots.

Should you fertilise wollemia pine after repotting?

Not immediately. Wait about 4 weeks after repotting wollemia pine. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.