Soil & potting mix
Best soil for Welwitsch's Anchomanes (Anchomanes welwitschii)
Also called Welwitsch's Anchomanes, African Anchomanes.
More about welwitsch's anchomanes
About Welwitsch's Anchomanes
Anchomanes welwitschii · also called Welwitsch's Anchomanes, African Anchomanes · tropical
Anchomanes welwitschii is a dramatic West and Central African tuberous aroid producing a single, large compound leaf on a spiny petiole that can reach over a metre in height. Suited to warm, humid tropical conditions with a pronounced dry-season dormancy. Rarely cultivated outside specialist collections, it demands humus-rich soil, warm temperatures, and ample indirect light.
Preferred mix: Rich, loose, free-draining tropical loam
Why welwitsch's anchomanes needs this mix
Welwitsch's Anchomanes is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Welwitsch's Anchomanes 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 welwitsch's anchomanes 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 welwitsch's anchomanes'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 welwitsch's anchomanes.
pH — does it matter for welwitsch's anchomanes?
Welwitsch's Anchomanes 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 welwitsch's anchomanes 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 welwitsch's anchomanes needs — the free-draining mix does the rest.
Refresh welwitsch's anchomanes'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 welwitsch's anchomanes covers the timing and technique step by step.
Welwitsch's Anchomanes soil — frequently asked questions
What is the best soil mix for welwitsch's anchomanes?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Welwitsch's Anchomanes 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 welwitsch's anchomanes?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates welwitsch's anchomanes's roots. A decent bagged houseplant compost works for welwitsch's anchomanes 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 welwitsch's anchomanes need a special pH?
Welwitsch's Anchomanes 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 welwitsch's anchomanes?
A decent bagged houseplant compost works for welwitsch's anchomanes 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 welwitsch's anchomanes?
Refresh welwitsch's anchomanes'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 welwitsch's anchomanes needs — the free-draining mix does the rest.
Keep reading
- Welwitsch's Anchomanes care — the full brief (light, water, humidity, problems, pet safety)
- How often to water welwitsch's anchomanes — the schedule the mix feeds into
- Repotting welwitsch's anchomanes — 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
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- All 8452 soil and potting-mix guides in the Growli library