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Repotting guide

When & how to repot Burrawang (Macrozamia communis)

Also called Burrawang, Burrawang Cycad, Common Zamia.

More about burrawang

About Burrawang

Macrozamia communis · also called Burrawang, Burrawang Cycad · tropical

Macrozamia communis is an Australian cycad native to coastal New South Wales, where it grows in dry sclerophyll forest understorey. It tolerates drought, poor soils, and deep shade once established, making it a resilient but very slow-growing ornamental. The single most important care fact is that it needs near-perfect drainage — waterlogged roots rot rapidly, often fatally. Highly toxic to dogs and cats (and humans); all parts contain cycasin and should be kept well away from pets and children.

Mature size: Fronds 1–2 m long; whole plant typically 1–1.5 m tall and wide after many decades.

Watch for — Caudex (crown) rot: The most common cause of death in cultivation. Caused by poorly draining soil or overwatering. Remove affected tissue, dust with sulphur fungicide, and repot into dry, gritty compost; do not water for two weeks.

How to tell burrawang needs repotting

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

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 burrawang

Every 2–3 years, into bone-dry mix. Burrawang's growth habit — clumping rosette cycad with a stout subterranean or low-emergent caudex bearing stiff, arching pinnate fronds. — sets the pace. Macrozamia communis is an Australian cycad native to coastal New South Wales, where it grows in dry sclerophyll forest understorey. It tolerates drought, poor soils, and deep shade once established, making it a resilient but very slow-growing ornamental. The single most important care fact is that it needs near-perfect drainage — waterlogged roots rot rapidly, often fatally. Highly toxic to dogs and cats (and humans); all parts contain cycasin and should be kept well away from pets and children.

What size pot to step burrawang up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Burrawang stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 burrawang

Spring or summer, while burrawang is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting burrawang

  1. Repot dry. Do not water burrawang for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
  2. Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty coarse, free-draining sandy loam or cactus mix ready.
  3. Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
  4. Pot into dry mix. Set burrawang at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
  5. Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep burrawang completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for burrawang

Burrawang wants coarse, free-draining sandy loam or cactus mix. Mix standard potting compost 1:1 with coarse grit or perlite. In the ground, raised beds or slopes with naturally sandy or rocky soil are ideal. Avoid clay-heavy ground. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting burrawang — frequently asked questions

How often should you repot burrawang?

Every 2–3 years, into bone-dry mix for burrawang. Repot burrawang every 2–3 years into a snug pot of coarse, free-draining sandy loam or cactus mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does burrawang need?

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Burrawang stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot burrawang?

Spring or summer, while burrawang is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Should you water burrawang after repotting?

No — not straight away. Repot burrawang into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise burrawang after repotting?

Not immediately. Wait about 3 weeks after repotting burrawang. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.

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