Soil & potting mix
Best soil for Monarch of the East (Sauromatum venosum)
Also called Voodoo Lily, Red Calla, Tender Arum.
More about monarch of the east
About Monarch of the East
Sauromatum venosum · also called Voodoo Lily, Red Calla · tropical
Sauromatum venosum is a remarkable tuberous aroid from tropical Africa and Asia known for producing its eerie, carrion-scented spathe from a bare, dry tuber placed on a shelf — no soil or water needed initially. The mottled purple-and-green spathe appears in spring before the attractive palmate leaf. All parts are toxic to people and pets.
Preferred mix: Rich, well-draining loam-based mix
Why monarch of the east needs this mix
Monarch of the East is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Monarch of the East 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 monarch of the east 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 monarch of the east'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 monarch of the east.
pH — does it matter for monarch of the east?
Monarch of the East 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 monarch of the east 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 monarch of the east needs — the free-draining mix does the rest.
Refresh monarch of the east'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 monarch of the east covers the timing and technique step by step.
Monarch of the East soil — frequently asked questions
What is the best soil mix for monarch of the east?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Monarch of the East 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 monarch of the east?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates monarch of the east's roots. A decent bagged houseplant compost works for monarch of the east 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 monarch of the east need a special pH?
Monarch of the East 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 monarch of the east?
A decent bagged houseplant compost works for monarch of the east 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 monarch of the east?
Refresh monarch of the east'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 monarch of the east needs — the free-draining mix does the rest.
Keep reading
- Monarch of the East care — the full brief (light, water, humidity, problems, pet safety)
- How often to water monarch of the east — the schedule the mix feeds into
- Repotting monarch of the east — 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 monosolenium tenerum
- Best soil for bolbitis heudelotii
- Best soil for ceratophyllum demersum
- All 11687 soil and potting-mix guides in the Growli library