With terrariums, there are two choices. Either leave the terrarium open to the elements or close it up with a stopper. If you aren't a botanist, it isn't immediately obvious why you'd choose one ...
“They are perfect if you travel a lot or are just bad at remembering to water your plants!” Sibley continues: “In a closed terrarium, the heat and oxygen the plants produce as they ...
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.