What you’ll need: A glass cloche and a saucer, or a large-mouthed apothecary or cookie jar; pebbles for drainage; sterilized soilless potting mix; a mister filled with distilled water; small scissors; a flowerpot; and a humidity-loving tropical houseplant, such as a button fern or a flame violet, that is compact or slow growing. If you’re having difficulty finding one, read the plant labels or ask a salesperson for help.
How to set it up: Arrange a one-inch layer of pebbles in the base of the terrarium. Transfer the plant from its original plastic pot to a ceramic or earthenware one, and add potting mix to fill if necessary. Use scissors to trim any yellow or brown leaves. Mist the soil with water and cover.
Position the pot. Place the plant in the center of the terrarium. Prune its leaves to ensure that none are touching the sides or the top of the glass.