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 ...

Gardener Peter Dowdall shares everything you need to know about terrariums, the garden in a glass jar that brings the outside ...

African violets also do fine in an open terrarium. A closed terrarium is excellent for many other plants that require higher humidity such as begonias, Swedish ivy, dwarf gloxinia, and miniature ...