For a minimalistic terrarium, combine an air plant in glass with a bit of twisted grapevine or some lava rocks from a hardware or crafts store, says Cain. This feathery fern makes a good base to ...

Megan Brame explains that 'If the terrarium has good sealing and the right plants ... so if you hate dealing with bugs, a terrarium may not be the best choice. There's more variety with houseplants.