SKU: 26203697976
best potting mix for terrariums

best potting mix for terrariums Premium Terrarium Blend – Soil Ninja

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Description

best potting mix for terrariums Premium Terrarium Blend – Soil NinjaUsing a Blend of: Coco Coir, Bark, Sand, Zeolite, Worm Castings, Activated Charcoal, Biochar About the Terrarium Soil Mix: A complete mixture for terrarium plants in terrarium environments. In both open and closed terrariums, this mixture provides fast draining properties tied with even moisture spread through the mix. A high amount of Activated Charcoal, Biochar and Zeolite stops heavy metals, impurities, minerals and other nasties from bruising up

Using a Blend of:
Coco Coir, Bark, Sand, Zeolite, Worm Castings, Activated Charcoal, Biochar

About the Terrarium Soil Mix:
A complete mixture for terrarium plants in terrarium environments. In both open and closed terrariums, this mixture provides fast draining properties tied with even moisture spread through the mix. A high amount of Activated Charcoal, Biochar and Zeolite stops heavy metals, impurities, minerals and other nasties from bruising up in the terrarium space. The addition of organic matter from bark allows for microfauna in the terrarium to create full ecosystem that feeds the plant with more fertiliser. The Sand in the mix also prevents the soil going muddy after long periods of being kept wet. 

What sort of soil should you use in a Terrarium:
Terrariums require a soil which not only is incredibly well draining, but also full of purifying elements such as Activated Charcoal that will trap any impurities that may be introduced from tap water- or a plant transplanting from a different substrate. Otherwise these impurities will permanently be in the terrarium space and will eventually cause issues further down the line. The soil must also maintain its properties and structure in high humidity conditions. Sand tends to stay put in humid conditions and doesn’t shift onwards like it can do in outdoor settings. If your terrarium is bioactive, there should be organic matter in the mix to provide the lifeforms living in your terrarium with food. 

As with all of our Premium mixes a population of positive bacteria, mycelium and microfauna is present in the substrate to create the potted ecosystem which keeps your plant healthy! Enough nutrients for the first 2 months of growth is also in every bag along with our specialist nutrient storage component, Zeolite.

Ideal For: (See our Houseplant Index)
African Violet, Brevirimosa Begonia, Butterfly Begonia, Peacock Begonia, Biophytum Sensitivum. Check our Soil Guide for more species that will thrive quickly once placed into a Terrarium.

Become a Houseplant Pro:
The easiest way to repot your houseplants
Identify beneficial and predatory bugs

Useful Tools:
Soil.Ninja Houseplant Index
Soil.Ninja Soil Calculator


How much soil do you need?
Using the sliders below, match the size of your new pot to see how much soil you should need.


Take a look at our very useful House Plant Index Here

Shipping Notes
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Exchange/Return Notes
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SKU: 26203697976

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Shooter
Pawtucket, US
★★★★★ 4
Nice economy casual sweater,
Size: Large, Color: Off-white
The sweater is fine for the price, with correct fit. Arrived fast. Nice neutral cream/oatmeal color. It has a fairly loose open weave and is predominantly cotton, so it’s quite breathable and well suited for layering in cool but not truly cold weather. The knit is a little coarse, not really scratchy but not very soft. It’s a good value for what they charge. And fine for casual wear. But I ultimately decided to return it and spend a lot more to get a merino wool sweater because they are dressier, much warmer for weight, MUCH softer, and less bulky under a jacket. I like to wear mock turtlenecks under a sport coat in the fall and this sweater was a little too thick for that.
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Reviewed in the United States on December 8, 2023
R
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Ralph A.
Dallas, US
★★★★★ 5
Soft and comfortable but runs a bit large
Size: Medium, Color: Off-white
I got this turtleneck in the off white color, and it looks very clean and easy to style. The color is true to what is shown and works well with casual or more dressed up outfits. The fabric feels soft and has a nice amount of stretch, which makes it comfortable to wear for longer periods without feeling stiff. The sweater feels lightweight but still warm enough for cooler days. It is not heavy or bulky, so it layers easily under jackets or coats. It also seems fairly wrinkle resistant. After wearing it and folding it, it still looked neat without needing much adjustment. In terms of fit, it does run a little big. I usually wear a medium, and while this one is still wearable, it feels slightly looser than expected, especially through the body. It is not a big deal, but I would probably order a smaller size next time for a more fitted look. The turtleneck itself sits comfortably around the neck and does not feel tight or irritating. Overall, it feels like a comfortable and easy to wear piece with good stretch, a nice lightweight feel, and a clean look. Just something to keep in mind on sizing if you prefer a closer fit.
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Reviewed in the United States on December 18, 2025
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Brittany
Natrona Heights, US
★★★★★ 3
Don’t recommend
Size: Medium, Color: Black
Got this as a last minute shirt for an event and it was roughly $12 on sale. The quality was ok, first wear was fine but it doesn’t hold up after washing and air drying. I don’t recommend unless only wearing once, there was a lot of shedding and pilling after the first wear. I’m rough 5 ft tall and about 140 lbs. and I got a M and it sat around my hips so unless your on the tall side this wouldn’t fit.
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Reviewed in the United States on January 7, 2026
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Reviewer
Carnegie, US
★★★★★ 5
Couldn't Be Better.
Size: Medium, Color: Charcoal Marl
Soft, warm, comfortable--and inexpensive.
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Reviewed in the United States on March 21, 2026
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Tyrone Carter
Natrona Heights, US
★★★★★ 5
The color
Size: Medium, Color: Black
Good fit an so comfortable
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Reviewed in the United States on April 7, 2026

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