Mature size & growth rate

How big does Hoop Pine (Araucaria cunninghamii) get?

Also called hoop pine, colonial pine, Moreton Bay pine.

More about hoop pine

About Hoop Pine

Araucaria cunninghamii · also called hoop pine, colonial pine · flowering

Araucaria cunninghamii, the hoop pine, is a tall Australian rainforest conifer named for the horizontal bark rings ringing its trunk. It carries dark, scale-like needles in tufts at branch tips and a distinctive domed crown. A slow-growing landscape and timber tree in warm climates, young plants make handsome, symmetrical indoor or patio specimens like its Norfolk relative.

Mature size: Up to 45-60 m tall in habitat; typically kept to 1-2 m as an indoor or patio plant for many years.

Watch for — Leaning, sparse growth: Insufficient light makes the tree stretch, lean, and lose its symmetry. Give it the brightest position possible and rotate the pot regularly for even growth.

Indoor size vs how big it gets in the wild

Hoop Pine is a tree at heart. Indoors a pot and your ceiling keep it to typically kept to 1-2 m as an indoor or patio plant for many years., but in the ground it is a different scale of plant entirely (up to 45-60 m tall in habitat). Indoors and in a pot, expect typically kept to 1-2 m as an indoor or patio plant for many years.. In the ground with no restriction it is a completely different plant — up to 45-60 m tall in habitat — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Growth rate and years to mature

Hoop Pine is a slow grower. Realistically, expect a decade or more — slow growers like this add only a few centimetres a year, so expect 8-15+ years to reach their indoor ceiling. Its feeding profile backs this up: feed potted specimens monthly through spring and summer with a balanced liquid fertiliser at half strength. landscape trees in good soil need little feeding; a light spring application of balanced granular fertiliser supports steady growth. do not feed in winter.

Want this turned into the right next pot at the right moment? The pot size calculator and the hoop pine repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast hoop pine grows.

How to keep hoop pine smaller

You are not stuck with the maximum size. For hoop pine specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: hoop pine can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape.
Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size.
Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height.
Good news: slow growth means topping it once buys you years before it needs doing again.

The keep-it-smaller method, step by step

Pick the new height. Decide how tall you want hoop pine and find a leaf node or branch point just below that.
Top the main stem. Cut the main growing tip cleanly just above that node in spring; this permanently caps the height and forces side branches.
Keep the pot snug. Avoid jumping to a much bigger pot — a slightly restricted rootball keeps the whole plant smaller.
Maintain the shape. Prune back the tallest new leaders each spring to hold it at the height you chose.

How to grow hoop pine bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for hoop pine the accelerators are:

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators.
Pot up a size every year or two while young; restricted roots are the main thing holding height back.
Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.

Light is almost always the ceiling. The hoop pine light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When hoop pine outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for hoop pine:

The top leaves pressing against or bent by the ceiling — the classic "this is now too tall indoors" sign.
It has to be moved away from a light source it has literally outgrown.
Roots filling the largest pot you can reasonably keep indoors — at that point it is top-or-prune or move it outside (if hardy).

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the hoop pine repotting guide. If you want more of this plant instead of a bigger one, the hoop pine propagation guide turns prunings into new plants.

Hoop Pine size — frequently asked questions

How big does hoop pine get?

Hoop Pine reaches typically kept to 1-2 m as an indoor or patio plant for many years. when grown indoors, and far larger where it grows unrestricted (up to 45-60 m tall in habitat). It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Is hoop pine slow or fast growing?

Hoop Pine is a slow grower. Expect a decade or more — slow growers like this add only a few centimetres a year, so expect 8-15+ years to reach their indoor ceiling. Hoop Pine is a tree at heart. Indoors a pot and your ceiling keep it to typically kept to 1-2 m as an indoor or patio plant for many years., but in the ground it is a different scale of plant entirely (up to 45-60 m tall in habitat).

How long does hoop pine take to reach full size?

Roughly a decade or more — slow growers like this add only a few centimetres a year, so expect 8-15+ years to reach their indoor ceiling. Light, pot size and feeding move that timeline more than anything else.

How do I keep hoop pine smaller?

The decisive tool is the secateurs: hoop pine can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape. Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size. Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height. Good news: slow growth means topping it once buys you years before it needs doing again.

How can I make hoop pine grow bigger or faster?

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators. Pot up a size every year or two while young; restricted roots are the main thing holding height back. Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.