Soil & potting mix
Best soil for 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.
Preferred mix: Fertile, free-draining loam enriched with compost
Watch for — Poor emergence in spring: Rhizomes need warmth (above 18°C) to break dormancy. Do not water until soil temperature rises adequately.
Why east indian arrowroot needs this mix
East Indian Arrowroot is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- East Indian Arrowroot is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
- A little perlite or bark stops ordinary compost compacting into an airless block over time, which is the slow, common cause of decline.
- It is not fussy about pH or special ingredients; getting the air-to-moisture balance right is what matters.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons east indian arrowroot struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates east indian arrowroot's roots.
- A pure peat mix that dries to a hard, water-repelling block is hard to re-wet and stresses the plant.
- No drainage hole turns even a good mix into a stagnant, root-rotting sump.
Reusing tired, compacted old compost or skipping the perlite. A free-draining mix in a pot with a hole solves most "why is it struggling" cases for east indian arrowroot.
pH — does it matter for east indian arrowroot?
East Indian Arrowroot is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A decent bagged houseplant compost works for east indian arrowroot as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Drainage and the pot
A pot with a drainage hole and a saucer you empty after watering is all east indian arrowroot needs — the free-draining mix does the rest.
Refresh east indian arrowroot's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. When the time comes, our repotting guide for east indian arrowroot covers the timing and technique step by step.
East Indian Arrowroot soil — frequently asked questions
What is the best soil mix for east indian arrowroot?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). East Indian Arrowroot is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
Can I use normal potting soil for east indian arrowroot?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates east indian arrowroot's roots. A decent bagged houseplant compost works for east indian arrowroot as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Does east indian arrowroot need a special pH?
East Indian Arrowroot is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
Should I buy a bagged mix or make my own for east indian arrowroot?
A decent bagged houseplant compost works for east indian arrowroot as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
How often should I refresh the soil for east indian arrowroot?
Refresh east indian arrowroot's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. A pot with a drainage hole and a saucer you empty after watering is all east indian arrowroot needs — the free-draining mix does the rest.
Keep reading
- East Indian Arrowroot care — the full brief (light, water, humidity, problems, pet safety)
- How often to water east indian arrowroot — the schedule the mix feeds into
- Repotting east indian arrowroot — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
- Best soil for silver air plant
- Best soil for northern needleleaf air plant
- Best soil for bartram's air plant
- All 11687 soil and potting-mix guides in the Growli library