Terrarium Care, Made Simple
The UK’s practical guide to building, growing and looking after healthy terrariums, from your first closed jar to a thriving bioactive ecosystem.
Whether you’re troubleshooting mould, wondering how often to water, or planning your first build, you’ll find clear, expert answers here, with no jargon and no guesswork.
A complete terrarium knowledge base
Terrariums are simple in principle and surprisingly easy to get wrong in practice. Most problems come down to a few things: water, airflow, light and the right plants. This site breaks each one down into clear, practical guidance you can actually use, whether you keep a single closed jar on your desk or a shelf full of them.
Everything here is written to answer the real questions terrarium owners ask, based on years of hands-on experience with terrariums in the UK.
Terrarium Care
The essentials of keeping a terrarium healthy long-term: watering, light, pruning and routine maintenance.
Watering
How much, how often, and the overwatering mistakes that cause most terrarium failures.
Open vs Closed Terrariums
The key differences, and how to choose the right type for your space and plants.
Plants & Moss
The best plants for open and closed terrariums, plus how to use moss and keep it alive.
DIY & Building
How to build your own terrarium, layer by layer, and the kit you’ll need to start.
Practical advice from people who build terrariums every day
This isn’t theory. The guidance here comes from years of hands-on experience designing, building and caring for terrariums in the UK, and from the questions real growers ask us most.
We focus on what actually works in a British home: the light levels, the plants you can realistically get hold of, and the conditions terrariums really live in. Where there’s a common myth or a quick fix that doesn’t work, we’ll tell you.
terrarium.co.uk is operated by Tropical Glass Ltd, a UK terrarium specialist established in 2021 and featured on ITV’s This Morning.
Prefer a terrarium that’s ready to go?
Building and balancing a terrarium takes a little patience. If you’d rather start with one that’s already thriving, or want a kit with everything measured out, there are ready-made terrariums and DIY kits delivered across the UK.
Latest Articles
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Why Is My Terrarium Mouldy?
Quick answer: Terrarium mould is almost always caused by too much moisture, poor airflow and decaying organic matter. It is common in new closed terrariums and usually harmless – most of the time it clears on its own or with a quick clean. To get rid of it, remove the affected material, wipe the glass,…
Terrarium Care, Made Simple
The UK’s practical guide to building, growing and looking after healthy terrariums, from your first closed jar to a thriving bioactive ecosystem.
Whether you’re troubleshooting mould, wondering how often to water, or planning your first build, you’ll find clear, expert answers here, with no jargon and no guesswork.
Explore terrarium guides →
A complete terrarium knowledge base
Terrariums are simple in principle and surprisingly easy to get wrong in practice. Most problems come down to a few things: water, airflow, light and the right plants. This site breaks each one down into clear, practical guidance you can actually use, whether you keep a single closed jar on your desk or a shelf full of them.
Everything here is written to answer the real questions terrarium owners ask, based on years of hands-on experience with terrariums in the UK.
Explore terrarium care by topic
Terrarium Care: The essentials of keeping a terrarium healthy long-term: watering, light, pruning and routine maintenance.
Watering: How much, how often, and the overwatering mistakes that cause most terrarium failures.
Mould & Troubleshooting: Why mould, condensation and dying plants happen, and how to fix them fast.
Open vs Closed Terrariums: The key differences, and how to choose the right type for your space and plants.
Plants & Moss: The best plants for open and closed terrariums, plus how to use moss and keep it alive.
DIY & Building: How to build your own terrarium, layer by layer, and the kit you’ll need to start.
Practical advice from people who build terrariums every day
This isn’t theory. The guidance here comes from years of hands-on experience designing, building and caring for terrariums in the UK, and from the questions real growers ask us most.
We focus on what actually works in a British home: the light levels, the plants you can realistically get hold of, and the conditions terrariums really live in. Where there’s a common myth or a quick fix that doesn’t work, we’ll tell you.
terrarium.co.uk is operated by Tropical Glass Ltd, a UK terrarium specialist established in 2021 and featured on ITV’s This Morning.
Prefer a terrarium that’s ready to go?
Building and balancing a terrarium takes a little patience. If you’d rather start with one that’s already thriving, or want a kit with everything measured out, there are ready-made terrariums and DIY kits delivered across the UK.
Browse ready-made terrariums & kits →