Soil & potting mix
Best soil for Fingerroot Ginger (Curcuma comosa)
Also called Wan Chak Motluk, Thai Ginger, Krachai.
More about fingerroot ginger
About Fingerroot Ginger
Curcuma comosa · also called Wan Chak Motluk, Thai Ginger · tropical
A Thai medicinal ginger with distinctive finger-like rhizomes and large, deep-green leaves with attractive purple midribs. Produces attractive pink-purple flower bracts in summer. Used extensively in Thai traditional medicine. An eye-catching tropical accent plant for warm gardens, conservatories, or large containers.
Preferred mix: Rich, humus-rich, free-draining loam
Why fingerroot ginger needs this mix
Fingerroot Ginger is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Fingerroot Ginger 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 fingerroot ginger 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 fingerroot ginger'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 fingerroot ginger.
pH — does it matter for fingerroot ginger?
Fingerroot Ginger 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 fingerroot ginger 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 fingerroot ginger needs — the free-draining mix does the rest.
Refresh fingerroot ginger'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 fingerroot ginger covers the timing and technique step by step.
Fingerroot Ginger soil — frequently asked questions
What is the best soil mix for fingerroot ginger?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Fingerroot Ginger 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 fingerroot ginger?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates fingerroot ginger's roots. A decent bagged houseplant compost works for fingerroot ginger 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 fingerroot ginger need a special pH?
Fingerroot Ginger 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 fingerroot ginger?
A decent bagged houseplant compost works for fingerroot ginger 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 fingerroot ginger?
Refresh fingerroot ginger'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 fingerroot ginger needs — the free-draining mix does the rest.
Keep reading
- Fingerroot Ginger care — the full brief (light, water, humidity, problems, pet safety)
- How often to water fingerroot ginger — the schedule the mix feeds into
- Repotting fingerroot ginger — 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 neglected air plant
- Best soil for golden-flowered ginger
- Best soil for lemon-scented ginger
- All 11687 soil and potting-mix guides in the Growli library