Repotting guide

When & how to repot Alocasia Sanderiana (Alocasia sanderiana)

Also called Kris plant, Sander's alocasia.

More about alocasia sanderiana

About Alocasia Sanderiana

Alocasia sanderiana · also called Kris plant, Sander's alocasia · tropical

Alocasia sanderiana, the Kris plant, has dramatic, narrow, deeply lobed arrowhead leaves of glossy dark green edged and veined in silvery white, with wavy scalloped margins resembling a Kris dagger. A warmth- and humidity-loving rhizomatous aroid, it needs bright indirect light, an airy moist mix and protection from cold. It is also a threatened species in the wild.

Mature size: Usually 45-60 cm tall and wide indoors, with leaves to about 30-40 cm long.

Watch for — Crispy leaf edges: Low humidity or salt accumulation. Raise humidity above 60%, water with tepid filtered water, and flush the pot occasionally to clear fertiliser salts.

How to tell alocasia sanderiana needs repotting

Repotting on a calendar is less reliable than reading the plant. For alocasia sanderiana, 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 sanderiana) 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 sanderiana

Only every 2–4 years, when genuinely crowded. Alocasia Sanderiana 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. Evergreen rhizomatous aroid forming an upright clump of long-petioled, deeply lobed arrowhead leaves. Moderate grower in warmth; may pause or go semi-dormant in cool, dim winters and regrow from the rhizome..

What size pot to step alocasia sanderiana up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Alocasia Sanderiana 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 sanderiana 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 sanderiana

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

Confirm it actually needs it. Slide alocasia sanderiana 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 sanderiana 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 loose, well-draining, moisture-retentive 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 sanderiana 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 sanderiana

Alocasia Sanderiana wants loose, well-draining, moisture-retentive aroid mix. Use potting soil amended with orchid bark, perlite and coco coir for aeration and moisture balance. Avoid heavy soils that stay wet around the rhizome. Slightly acidic pH (around 5.5-6.5) suits it; pot with generous drainage. 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 sanderiana — frequently asked questions

How often should you repot alocasia sanderiana?

Only every 2–4 years, when genuinely crowded for alocasia sanderiana. Only repot alocasia sanderiana 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 loose, well-draining, moisture-retentive aroid mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does alocasia sanderiana need?

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

Does alocasia sanderiana like to be root-bound?

Yes — alocasia sanderiana 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 sanderiana after repotting?

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