Soil & potting mix
Best soil for Pink Sundew (Drosera capillaris)
Also called pink sundew, hair-leaf sundew.
More about pink sundew
About Pink Sundew
Drosera capillaris · also called pink sundew, hair-leaf sundew · houseplant
Drosera capillaris is a small North American sundew native to wet coastal plain habitats from the southeastern United States through the Caribbean. It forms tight flat rosettes with spoon-shaped leaves bearing vivid red sticky tentacles and produces charming pink flowers on wiry scapes. It self-seeds freely and tolerates heat, making it an easy beginner carnivore.
Preferred mix: Nutrient-poor peat-sand or peat-perlite mix
Watch for — Leaves flattening and losing red colour: Indicates insufficient light. Increase light intensity or duration. Plants in good light are compact and deeply red; shaded plants become green and elongated.
Why pink sundew needs this mix
Pink Sundew is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Pink 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 pink 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 pink 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 pink sundew.
pH — does it matter for pink sundew?
Pink 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 pink 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 pink sundew needs — the free-draining mix does the rest.
Refresh pink 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 pink sundew covers the timing and technique step by step.
Pink Sundew soil — frequently asked questions
What is the best soil mix for pink sundew?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Pink 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 pink sundew?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates pink sundew's roots. A decent bagged houseplant compost works for pink 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 pink sundew need a special pH?
Pink 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 pink sundew?
A decent bagged houseplant compost works for pink 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 pink sundew?
Refresh pink 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 pink sundew needs — the free-draining mix does the rest.
Keep reading
- Pink Sundew care — the full brief (light, water, humidity, problems, pet safety)
- How often to water pink sundew — the schedule the mix feeds into
- Repotting pink 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
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- All 6887 soil and potting-mix guides in the Growli library