Repotting guide

When & how to repot Alocasia Polly (Alocasia × amazonica 'Polly')

Also called African mask plant, Amazonian elephant's ear 'Polly', Polly alocasia, Elephant's ear.

More about alocasia polly

About Alocasia Polly

Alocasia × amazonica 'Polly' · also called African mask plant, Amazonian elephant's ear 'Polly' · tropical

Alocasia 'Polly' is a compact tropical aroid prized for its arrow-shaped, near-black leaves laced with bold white-green veins. Its one defining need is steady warmth and high humidity: keep it above 15°C in bright, indirect light, never soggy and never bone-dry. Treat it as a fussy but rewarding indoor specimen rather than a beginner houseplant.

Mature size: Compact: typically 30-50 cm (about 1-2 ft) tall and wide indoors, reaching its ultimate size in 1-2 years (RHS).

Watch for — Yellowing leaves: Usually a watering problem: overwatering and soggy compost are the most common cause and the first warning of root rot. A single old outer leaf yellowing is normal; multiple leaves yellowing at once means check the roots and the moisture.

How to tell alocasia polly needs repotting

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

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for alocasia polly) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 polly

Only every 2–4 years, when genuinely crowded. Alocasia Polly is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. A clump-forming, rhizomatous evergreen perennial with an upright rosette of long-stalked, arrow-shaped leaves. New leaves unfurl one at a time from the centre, and older outer leaves naturally yellow and die back as the plant ages, which is normal rather than a sign of trouble..

What size pot to step alocasia polly up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Alocasia Polly positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping alocasia polly into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 polly

Early spring, just as new growth restarts, is the ideal window for alocasia polly. 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 alocasia polly

Confirm it actually needs it. Slide alocasia polly out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip alocasia polly out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh airy, peat-free aroid mix, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water alocasia polly again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for alocasia polly

Alocasia Polly wants airy, peat-free aroid mix. Use a free-draining, peat-free houseplant compost lightened with perlite, plus a handful of orchid bark or coir for structure; the RHS recommends loam-based, moist but well-drained, acid-to-neutral soil. The chunky open texture lets the rhizome breathe and water flow through fast, which is the single best defence against the rot Alocasia are prone to. Always use a pot with drainage holes. 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 polly — frequently asked questions

How often should you repot alocasia polly?

Only every 2–4 years, when genuinely crowded for alocasia polly. Only repot alocasia polly every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using airy, peat-free aroid mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does alocasia polly need?

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

Does alocasia polly like to be root-bound?

Yes — alocasia polly genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise alocasia polly after repotting?

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