Repotting guide

When & how to repot East Indian Arrowroot (Curcuma angustifolia)

Also called Narrow-Leaved Turmeric, Indian Arrowroot, Tikhur.

More about east indian arrowroot

About East Indian Arrowroot

Curcuma angustifolia · also called Narrow-Leaved Turmeric, Indian Arrowroot · tropical

A tall Indian ginger relative with narrow, lance-shaped leaves and pale pink to white flowering spikes. The starchy rhizomes are a traditional food source in central India, where it is called tikhur. Ornamentally valued for its elegant foliage and delicate floral display. Dormant in winter; rhizomes require dry, frost-free storage.

Mature size: 90-120 cm tall in flower

How to tell east indian arrowroot needs repotting

Repotting on a calendar is less reliable than reading the plant. For east indian arrowroot, 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 east indian arrowroot) 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 east indian arrowroot

Only every 2–4 years, when genuinely crowded. East Indian Arrowroot 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. Upright rhizomatous tropical perennial.

What size pot to step east indian arrowroot up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. East Indian Arrowroot 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 east indian arrowroot 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 east indian arrowroot

Early spring, just as new growth restarts, is the ideal window for east indian arrowroot. 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 east indian arrowroot

Confirm it actually needs it. Slide east indian arrowroot 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 east indian arrowroot 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 fertile, free-draining loam enriched with compost, 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 east indian arrowroot 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 east indian arrowroot

East Indian Arrowroot wants fertile, free-draining loam enriched with compost. A rich but well-drained growing medium is ideal. In containers, use a good-quality potting mix amended with perlite or sharp sand for improved 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 east indian arrowroot — frequently asked questions

How often should you repot east indian arrowroot?

Only every 2–4 years, when genuinely crowded for east indian arrowroot. Only repot east indian arrowroot 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 fertile, free-draining loam enriched with compost. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does east indian arrowroot need?

When is the best time of year to repot east indian arrowroot?

Does east indian arrowroot like to be root-bound?

Yes — east indian arrowroot 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 east indian arrowroot after repotting?

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