Soil & potting mix
Best soil for Ord River Sundew (Drosera ordensis)
Also called Ord River sundew.
More about ord river sundew
About Ord River Sundew
Drosera ordensis · also called Ord River sundew · tropical
Drosera ordensis is a tropical carnivorous sundew in the petiolaris complex, endemic to the Ord River catchment area of the Kimberley region, Western Australia, where it colonises seasonally inundated red sandy soils and rocky outcrops. Like all petiolaris group sundews it follows a pronounced monsoon cycle — growing vigorously in the hot wet season and retreating to the rhizome in the warm dry season. The single most critical care point is to maintain warmth year-round (never below 15 °C) even during the drier rest period, as cold combined with moisture triggers fatal rot. Drosera is not listed as toxic to cats or dogs by the ASPCA and is considered non-toxic to pets.
Preferred mix: Sandy peat or coir mix
Watch for — Rhizome rot after the monsoon season: Reducing watering too slowly when the plant enters its dry rest, especially at lower temperatures, promotes Pythium and other root pathogens. Taper watering gradually over 2–3 weeks as temperatures rise towards the end of the wet season in cultivation.
Why ord river sundew needs this mix
Ord River Sundew is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Ord River Sundew 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 ord river sundew 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 ord river sundew'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 ord river sundew.
pH — does it matter for ord river sundew?
Ord River Sundew 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 ord river sundew 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 ord river sundew needs — the free-draining mix does the rest.
Refresh ord river sundew'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 ord river sundew covers the timing and technique step by step.
Ord River Sundew soil — frequently asked questions
What is the best soil mix for ord river sundew?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Ord River Sundew 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 ord river sundew?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates ord river sundew's roots. A decent bagged houseplant compost works for ord river sundew 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 ord river sundew need a special pH?
Ord River Sundew 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 ord river sundew?
A decent bagged houseplant compost works for ord river sundew 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 ord river sundew?
Refresh ord river sundew'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 ord river sundew needs — the free-draining mix does the rest.
Keep reading
- Ord River Sundew care — the full brief (light, water, humidity, problems, pet safety)
- How often to water ord river sundew — the schedule the mix feeds into
- Repotting ord river sundew — 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 balisier heliconia
- Best soil for wild plantain heliconia
- Best soil for amazonian traveller's tree
- All 10153 soil and potting-mix guides in the Growli library