Repotting guide

When & how to repot Anthurium arisaemoides (Anthurium arisaemoides)

Also called arisaema-like anthurium.

More about anthurium arisaemoides

About Anthurium arisaemoides

Anthurium arisaemoides · also called arisaema-like anthurium · tropical

Anthurium arisaemoides is a small, unusual South American anthurium with deeply divided, arisaema-like compound leaves quite unlike the typical heart-shaped species. A humidity-loving epiphyte, it suits terrariums and grow cabinets with bright indirect light and an airy aroid mix. Distinctive among collectors, it is toxic to cats and dogs.

Mature size: A compact species, generally staying around 20-40 cm tall and wide, well suited to enclosed setups.

Watch for — Drying out too fast: Its small rootball and airy mix dry quickly; check moisture more often and keep the medium lightly moist.

How to tell anthurium arisaemoides needs repotting

Repotting on a calendar is less reliable than reading the plant. For anthurium arisaemoides, 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 anthurium arisaemoides) 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 anthurium arisaemoides

Only every 2–4 years, when genuinely crowded. Anthurium arisaemoides 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. Small epiphytic aroid with an atypical growth form for the genus, producing deeply lobed or compound, arisaema-like leaves from a compact base; clumping and modest in stature..

What size pot to step anthurium arisaemoides up to

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

Early spring, just as new growth restarts, is the ideal window for anthurium arisaemoides. 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 anthurium arisaemoides

Confirm it actually needs it. Slide anthurium arisaemoides 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 anthurium arisaemoides 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 light, airy epiphytic 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 anthurium arisaemoides 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 anthurium arisaemoides

Anthurium arisaemoides wants light, airy epiphytic mix. A fine-to-medium chunky blend of orchid bark, perlite, fine coco, and sphagnum holds gentle moisture while staying open. Its relatively delicate roots prefer a medium that never compacts; in terrariums a sphagnum-heavy mix works well with good airflow. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting anthurium arisaemoides — frequently asked questions

How often should you repot anthurium arisaemoides?

Only every 2–4 years, when genuinely crowded for anthurium arisaemoides. Only repot anthurium arisaemoides 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 light, airy epiphytic mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does anthurium arisaemoides need?

When is the best time of year to repot anthurium arisaemoides?

Does anthurium arisaemoides like to be root-bound?

Yes — anthurium arisaemoides 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 anthurium arisaemoides after repotting?

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