Repotting guide

When & how to repot Alocasia Brisbanensis (Alocasia brisbanensis)

Also called cunjevoi, Queensland alocasia.

More about alocasia brisbanensis

About Alocasia Brisbanensis

Alocasia brisbanensis · also called cunjevoi, Queensland alocasia · tropical

Alocasia brisbanensis, the cunjevoi, is a robust Australian native from eastern rainforests with large, glossy arrowhead leaves on tall fleshy stems. It is a vigorous, clumping tuberous aroid that wants bright filtered light, steady warmth, high humidity, and a rich, free-draining mix. Every part is toxic to pets and people.

Mature size: Reaches 1-2 m tall in the ground in warm climates; usually 0.6-1.2 m as a container plant indoors.

Watch for — Drooping or wilting: Often underwatering on a thirsty plant, or conversely root rot from soggy soil. Check the mix's moisture before correcting either way.

How to tell alocasia brisbanensis needs repotting

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

Flowering has tailed off year on year and the clump has become congested and overcrowded.
Lots of leaf and few flowers — a classic sign that alocasia brisbanensis bulbs or tubers need lifting and dividing.
Bulbs visibly bursting the pot or pushing each other to the surface.
It is the natural dormancy window (foliage yellowed and died back) — the only safe time to lift and split.

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 alocasia brisbanensis

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, alocasia brisbanensis is lifted and divided once the clump congests and flowering drops off. A large, clumping, tuberous evergreen that forms tall fleshy upright stems topped with broad arrowhead leaves, spreading by rhizomes and offsets into substantial clumps..

What size pot to step alocasia brisbanensis up to

Pot size matters less than depth and spacing here. When you replant alocasia brisbanensis, set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one.

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 alocasia brisbanensis

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing alocasia brisbanensis in full growth or flower sets it back badly.

Step-by-step: repotting alocasia brisbanensis

Wait for dormancy. Let alocasia brisbanensis foliage yellow and die back completely. Lifting while it is in growth wastes the energy it is storing for next year.
Lift carefully. Loosen the soil well away from the bulbs/tubers with a fork and ease the whole clump out without spearing them.
Separate the offsets. Gently pull the clump apart into individual bulbs or tubers. Keep only firm, healthy, blemish-free ones.
Replant at the right depth. Reset them in fresh rich, moisture-retentive yet free-draining mix at the correct depth and spacing — not touching — so each has room to bulk up.
Water in and rest. Water once to settle them, then keep on the dry side until growth resumes. Do not feed until leaves are actively growing.

Aftercare

After replanting alocasia brisbanensis, keep the soil barely moist — not wet — until shoots appear; bulbs and tubers rot in cold, saturated soil. Once leaves are growing strongly, resume normal watering. Hold off feeding until the plant is in active growth again.

The right soil mix for alocasia brisbanensis

Alocasia Brisbanensis wants rich, moisture-retentive yet free-draining mix. Use a fertile aroid blend of compost or peat with perlite and bark. It is more forgiving of richer soil than smaller Alocasia but still needs sharp drainage to protect the tuber from rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting alocasia brisbanensis — frequently asked questions

How often should you repot alocasia brisbanensis?

Lift and divide every 3–4 years once clumps congest for alocasia brisbanensis. Alocasia Brisbanensis is lifted and divided, not "repotted". Every 3–4 years, once the foliage has died back and it is dormant, lift the clump, separate the offsets, and replant at the correct depth in rich, moisture-retentive yet free-draining mix. Crowding, not pot size, is what reduces flowering over time.

What size pot does alocasia brisbanensis need?

When is the best time of year to repot alocasia brisbanensis?

Do you "repot" alocasia brisbanensis, or lift and divide it?

You lift and divide it. Alocasia Brisbanensis grows from bulbs or tubers, so instead of repotting you wait for dormancy, lift the congested clump, separate the healthy offsets, and replant them at the right depth and spacing. Doing this every 3–4 years restores flowering.

Should you fertilise alocasia brisbanensis after repotting?

Hold off feeding alocasia brisbanensis until it is in active growth again. Fresh soil already carries enough nutrients to get it re-established, and feeding disturbed roots too soon does more harm than good.