Open or closed terrarium? The six-question quiz

1. 1
   You answer six questionsYour time, the light in the room, the plants you like, the space, your level, and who the terrarium is for. One question per screen.
2. 2
   The scales tipEach answer gives points to the closed terrarium or to the open terrarium. Two answers decide alone: succulents and full sun always lead to the open terrarium.
3. 3
   The size comes from your space and your levelThe tool suggests 3 to 5 litres or 6 to 12 litres. It never suggests less than 3 litres: a very small jar is the hardest to keep in balance.
4. 4
   You keep the resultCopy the result or its address. Then go to the substrate calculator to find out how much to buy.

What the tool does not know

• The tool cannot see your room. It relies on what you say about the light.
• The dimensions are calculated for a round jar that is as tall as it is wide. Another shape with the same volume has other measurements.
• The volumes in litres come from our guidelines for closed terrariums. For an open terrarium, they are a rough guide.
• The tool suggests only two types. It does not cover the half-closed terrarium, carnivorous plants or terrariums for animals.
• It does not replace the plant label. Always check the adult size of the plant.

• Closed or open terrarium: how to choose
• What size of terrarium should you choose to start with
• Your first terrarium: the beginner's guide
• Which container for a terrarium? Jar, bottle, cloche or geometric glass

Would you rather have a terrarium ready to build?Have a look at the terrarium kits.See the terrarium kits