Under Glass

Library

Guides

Short, practical lessons written for beginners — clear language, no gatekeeping.

Quarantine and Settling New Terrarium Plants
plantsbeginner

Quarantine and Settling New Terrarium Plants

How to keep snails, mites, fungus gnats and pesticide residues out of a sealed case by holding new plants in a simple quarantine, rinsing nursery soil, then settling them gently into high humidity.

9 min read

Hardscape That Stays Safe Under Glass
buildingbeginner

Hardscape That Stays Safe Under Glass

Choosing and preparing wood, cork, stone and ornaments so they do not leach toxins, collapse, salt the substrate, or seed endless mould blooms inside a humid case.

10 min read

Drainage Layers: What Actually Matters
substratesbeginner

Drainage Layers: What Actually Matters

Separating myth from function: why jars without holes still use LECA or gravel, when charcoal helps, why a mesh barrier matters, and why a drainage layer cannot save chronic overwatering.

9 min read

Light, Windowsills and Grow Lights for UK Terrariums
carebeginner

Light, Windowsills and Grow Lights for UK Terrariums

How British daylight (short winters, weak north rooms) shapes terrarium placement, when a simple full-spectrum LED earns its keep, and how to avoid cooking a sealed jar on a sunny sill.

10 min read

Pruning and Long-Term Terrarium Maintenance
carebeginner

Pruning and Long-Term Terrarium Maintenance

Closed cases are low-input, not no-input: how to prune for airflow and light, refresh litter for fauna, and keep a jar beautiful for years without constant tinkering.

8 min read

Bioactive Order of Operations
faunabeginner

Bioactive Order of Operations

A practical build sequence for plant-first bioactive jars: hardscape and substrate before plants, springtails before (or well ahead of) isopods, leaf litter as pantry, and patience before declaring victory.

10 min read

Beginner Tools and Kit for Terrarium Building
fundamentalsbeginner

Beginner Tools and Kit for Terrarium Building

A short, UK-practical kit list: what you truly need to build and maintain a first closed case, what can wait, and which must-have gadgets are optional.

7 min read

Open Arid Bowls: The Contrast Path
buildingbeginner

Open Arid Bowls: The Contrast Path

Why succulents belong in open bowls, not Wardian sealed cases — gritty soil, airflow, sparse watering, and how cleanup crew (if any) must be temperate drought-tolerant species with a hidden damp refuge.

9 min read

Propagating Cuttings for Terrarium Jars
plantsbeginner

Propagating Cuttings for Terrarium Jars

Turn one healthy Fittonia or Peperomia into several jar-ready plants — water vs substrate rooting, humidity tricks, and when a cutting is tough enough to seal.

8 min read

Matching Plants to One Climate
plantsbeginner

Matching Plants to One Climate

A terrarium succeeds when every plant wants the same light, humidity and airflow — not when the jar looks like a gift-shop sampler of opposites.

9 min read

Cycling and Venting a New Closed Case
buildingbeginner

Cycling and Venting a New Closed Case

The first fortnight after sealing is a negotiation with moisture and microbes — how to vent on purpose, read condensation, and introduce cleanup crew without panicking at every white speck.

9 min read

Mould vs Mycelium: How to Tell What You’re Seeing
troubleshootingbeginner

Mould vs Mycelium: How to Tell What You’re Seeing

Fuzzy panic versus fine white threads — what to leave, what to pick off, and when to open the lid.

11 min read

Bottle Gardens (Advanced)
buildingadvanced

Bottle Gardens (Advanced)

Narrow necks demand patience, slow growers, and tiny water doses.

9 min read

Setting Up a Cabinet Case
buildingintermediate

Setting Up a Cabinet Case

Lights, vents, and layers for a larger humid collection.

10 min read

Composition & Scale
buildingbeginner

Composition & Scale

Foreground, mid-ground, background — make a tiny scene read clearly.

7 min read

Moss Care
plantsbeginner

Moss Care

Keep carpets green with mist, shade, and contact.

7 min read

Black-and-white half-length portrait of Nathaniel Bagshaw Ward in Victorian dress, from an 1859 lithograph.
fundamentalsbeginner

Nathaniel Bagshaw Ward & the Case

A short pointer to the full history of Ward, the glazed case, and today’s closed terrariums.

4 min read

How to Choose a Case
buildingbeginner

How to Choose a Case

A short decision path based on life, light, and maintenance time.

6 min read

Troubleshooting Common Issues
troubleshootingbeginner

Troubleshooting Common Issues

Yellow leaves, mushy stems, brown moss — change one thing, then wait.

12 min read

Substrate Basics
substratesbeginner

Substrate Basics

Air, water, and structure — the three jobs of a good mix.

9 min read

Isopods for Beginners
faunabeginner

Isopods for Beginners

Visible cleanup crew once springtails are thriving.

8 min read

Adding Springtails
faunabeginner

Adding Springtails

Why microfauna are the friendliest bioactive upgrade.

7 min read

Watering & Condensation
carebeginner

Watering & Condensation

Read the glass like weather — then add or take away water in tiny amounts.

12 min read

Small planted glass jar terrarium on a clean surface
buildingbeginner

Your First Terrarium

A calm, beginner pathway from clean glass to living scene.

12 min read

Closed vs Open Cases
fundamentalsbeginner

Closed vs Open Cases

Pick the climate before you pick the plants.

7 min read

What Is a Terrarium?
fundamentalsbeginner

What Is a Terrarium?

A tiny planted world under glass — how the water cycle makes it work.

8 min read