Terrarium in a closed jar

Terrarium in a closed jar

Making a terrarium in a closed glass jar is pretty easy.

And once the terrarium is stabilized, it needs no further care.

It needs no added fertilizer as there are enough nutrients in the potting soil and you actually do not want the plants to grow too much.

It is best to choose plants that remain small, then your terrarium will last for a very long time.

If you choose plants that will grow in height, you will probably have to renew your terrarium after about a year: pull out the tall plants and replace them with smaller plants.

Stabilizing the terrarium:

When the plants are in place, water the terrarium slightly.

Your terrarium is ready. Place it in a bright location but out of direct sunlight because the terrarium will quickly become too hot.

Leave it until the next day and take a look in the morning to check for condensation on the walls.

If there is no condensation, there is not enough water and you have to a add little more.

If the condensation is abundant, leave the jar open for an hour and close it again.

The next day, check to see how much condensation there is on the walls.

Ideally, it should look lightly foggy: a mist of water, not fat water droplets that trickle down.


  • 1 jar with lid
  • pebbles or clay granules as a drainage layer
  • potting soil
  • a few small plants


Clean the bowl with washing up liquid, rinse with clear water and let it dry.

Apply a layer of pebbles or clay granules on the bottom.


Place a layer of potting soil on top of it and place the plants.


Clean the walls with a sheet of kitchen paper wounded around the handle of a wooden kitchen spoon.


Close the jar and check the next day how much condensation is formed.

Add a little water or leave the terrarium open, depending on the amount of condensation.


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