Soil & potting mix
Best soil for Big Blue Lilyturf (Liriope muscari 'Big Blue')
Also called Lilyturf, Monkey Grass, Border Grass.
More about big blue lilyturf
About Big Blue Lilyturf
Liriope muscari 'Big Blue' · also called Lilyturf, Monkey Grass · houseplant
Big Blue Lilyturf is a clump-forming grass-like perennial with arching dark green strap leaves and violet-blue flower spikes in late summer. Indoors it thrives in bright indirect to medium light with consistent moisture. It contains steroidal saponins and is toxic to dogs and cats.
Preferred mix: Moist but well-draining all-purpose potting mix
Watch for — Root rot: Overwatering in poorly draining soil causes crown and root rot. Ensure the pot has drainage holes and allow the top soil to dry between waterings.
Why big blue lilyturf needs this mix
Big Blue Lilyturf is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Big Blue Lilyturf 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 big blue lilyturf 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 big blue lilyturf'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 big blue lilyturf.
pH — does it matter for big blue lilyturf?
Big Blue Lilyturf 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 big blue lilyturf 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 big blue lilyturf needs — the free-draining mix does the rest.
Refresh big blue lilyturf'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 big blue lilyturf covers the timing and technique step by step.
Big Blue Lilyturf soil — frequently asked questions
What is the best soil mix for big blue lilyturf?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Big Blue Lilyturf 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 big blue lilyturf?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates big blue lilyturf's roots. A decent bagged houseplant compost works for big blue lilyturf 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 big blue lilyturf need a special pH?
Big Blue Lilyturf 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 big blue lilyturf?
A decent bagged houseplant compost works for big blue lilyturf 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 big blue lilyturf?
Refresh big blue lilyturf'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 big blue lilyturf needs — the free-draining mix does the rest.
Keep reading
- Big Blue Lilyturf care — the full brief (light, water, humidity, problems, pet safety)
- How often to water big blue lilyturf — the schedule the mix feeds into
- Repotting big blue lilyturf — 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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