First, you will need to fill the bottom of your glass jar with a layer of pebbles, this helps with drainage and moisture.
How to make your terrarium:
Add a small handful of activated charcoal into the Terrarium. This helps to filter and purify the water and stops it from smelling.
Next, you need to add some moss. This acts as a barrier to stop all the soil from going to the bottom of the jar.
Now add the soil on top of the moss, you're going to bury the plants into the soil so make sure you put in enough to cover the roots. The soil provides nutrients for the plants and these nutrients are constantly recycled as the plants continue to grow.
Bury your plant into the soil you've added to the terrarium. (You may need to use some long tweezers to do this).
Finally, add some water to it to keep the soil moist then seal the jar. As long as the jar is sealed tight you don't need to water it again because the terrarium creates a small enclosed water cycle. Both the plants and soil in the terrarium release moisture and water vapour. This condenses against the walls of the terrarium and falls back into the soil to be used again!