Free terrarium tools
Simple tools to build and keep a terrarium. Each one answers a precise question in under a minute. Everything is free, with no sign-up.
All the tools
Substrate calculator
To know how much drainage, charcoal and substrate to buy, based on the shape of your jar.
CalculateFind my kit
To choose a terrarium kit based on your light, your space and your budget.
Find my kitTerrarium doctor
To find the cause of a problem, yellow leaves, condensation, mould or gnats, and the step that fixes it.
DiagnoseWhen should I water my terrarium?
To know whether to water, and how much, from what you see in the jar.
CheckOpen or closed terrarium?
To choose the type and size of jar that suit your room and your plants.
ChooseWho lives with whom?
To check that two or three plants can live in the same jar, before you buy them.
CheckMy window
To know which plants can live near your window, based on its direction and the distance to the glass.
Test my windowKit or DIY?
To compare the cost and effort of a kit with parts bought one by one.
CompareWhich plant are you?
To discover in six questions the terrarium plant that is most like you, and share it.
Take the quiz