Leaf Journal
Cover of The terrarium field guide

Field guide · PDF

The terrarium field guide

A rainforest, in a jar — the only garden that waters itself, hides from the cat, and files its own weather report.

€15incl. VAT

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Prefer the lot? The sprout person's pack for €35 — save €10.

How to build a sealed bottle ecosystem that waters itself — the water-cycle argument (and the famous jar that ran 40 years), closed vs open, the vessel, the false bottom done honestly, the cast of plants that actually live sealed, and how to read the fog on the glass like a weather report. Cat-safe by design: the one garden a committed leaf-chewer physically can't reach.

  • · 19-page PDF
  • · Print-at-home
  • · Personal licence

What's inside

  • The sealed-jar thesis
  • The build, on one page
  • Closed vs open
  • The vessel
  • The layer system
  • The cast list
  • The build sequence + reading the fog
  • When it goes wrong + the springtails
  • The weather report + the "sealed on" label

Who's behind this

I'm not a botanist, and I don't have 150 plants — I keep a windowsill's worth, and I've killed a few learning how (a Calathea in eleven days is how this whole thing started). When something goes wrong I go down the rabbit hole: the studies, the extension-horticulture pages, the 2am forum threads, and every horror story plant people send in on @leafjournal on TikTok. These guides are that mix — hands-on experience checked against the research, cleaned up and told straight. No lab, no sponsorships, no “trust me.” Just what actually keeps a plant alive, so yours isn't the one that learns it the hard way.

Best value

The sprout person's pack

Everything a first plant needs — and the red flags before you buy.

The beginner's ten · The unkillables · Plant red flags

€35€45

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Quick answers

How do I get the guide?

Right after payment you land on a download page, and the link also arrives in your inbox. It's a PDF — read it on your phone, tablet, or print it.

Do I need an account?

No. Your email address is all it takes — that's where the download goes.

What if it's not for me?

Email hello@leafjournal.app within 30 days and you get your money back. No forms, no questions. I'd rather refund you than have you own a guide you don't use.

If this guide doesn't help you, I'll refund it — email hello@leafjournal.app within 30 days and it's done.

The terrarium field guide

€15incl. VAT