Mature size & growth rate

How big does Australian Foxtail Cycad (Macrozamia communis) get?

Also called Burrawang.

More about australian foxtail cycad

About Australian Foxtail Cycad

Macrozamia communis · also called Burrawang · houseplant

The Burrawang is an Australian cycad with a mostly underground caudex and a dense, fountain-like crown of arching, dark green fronds. Tough and drought-resistant, it tolerates poor soils and neglect once established. Indoors it needs bright light and very sharp drainage. Its large seeds are highly toxic, so keep it well away from pets and children.

Mature size: Crown spread to around 1.5-2 m; trunk largely underground, so overall height usually stays under 1.5 m.

Indoor size vs how big it gets in the wild

Australian Foxtail Cycad is a tree at heart. Indoors a pot and your ceiling keep it to crown spread to around 1.5-2 m, but in the ground it is a different scale of plant entirely (trunk largely underground, so overall height usually stays under 1.5 m.). Indoors and in a pot, expect crown spread to around 1.5-2 m. In the ground with no restriction it is a completely different plant — trunk largely underground, so overall height usually stays under 1.5 m. — 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

Australian Foxtail Cycad 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 lightly once or twice in spring and summer with a slow-release palm/cycad fertiliser or a balanced half-strength liquid feed. it is adapted to poor soils, so feed sparingly; add magnesium for frond colour and stop in winter.

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

How to keep australian foxtail cycad smaller

You are not stuck with the maximum size. For australian foxtail cycad specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: australian foxtail cycad 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 australian foxtail cycad 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 australian foxtail cycad bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for australian foxtail cycad 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 australian foxtail cycad light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When australian foxtail cycad outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for australian foxtail cycad:

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 australian foxtail cycad repotting guide. If you want more of this plant instead of a bigger one, the australian foxtail cycad propagation guide turns prunings into new plants.

Australian Foxtail Cycad size — frequently asked questions

How big does australian foxtail cycad get?

Australian Foxtail Cycad reaches crown spread to around 1.5-2 m when grown indoors, and far larger where it grows unrestricted (trunk largely underground, so overall height usually stays under 1.5 m.). 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 australian foxtail cycad slow or fast growing?

Australian Foxtail Cycad 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. Australian Foxtail Cycad is a tree at heart. Indoors a pot and your ceiling keep it to crown spread to around 1.5-2 m, but in the ground it is a different scale of plant entirely (trunk largely underground, so overall height usually stays under 1.5 m.).

How long does australian foxtail cycad 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 australian foxtail cycad smaller?

The decisive tool is the secateurs: australian foxtail cycad 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 australian foxtail cycad 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.