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.

Water molecules break away the surface of the water (evaporate) and also rejoin the water (condense). In a closed jar or terrarium, the rate of evaporation and condensation would eventually become ...

David established the terrarium by placing a quarter pint of compost and water inside the ten-gallon bottle ... s sealed ...