My hunch is that trough gardening might just displace the now-ubiquitous terrarium in the hierarchy of green trends.

WSJ: Trough Gardening: A Challenger to the Terrarium Craze?

"We've seen an increase in terrarium building for about two years now, " said Melodie McDanal, a Pike Nurseries associate and Georgia-certified nursery professional.

CNN: Terrariums make it big by going small

Generally, all anyone really needs to make a terrarium is a vessel, a plant and a substrate for the plant to grow in.

CNN: Terrariums make it big by going small

The store provides workshops on things like terrarium gardening and Japanese "kokedama, " hanging plants that appear to float, free of containers, from the ceiling.

WSJ: The $1,300 Chicken Coop and Other Signs That Backyard Farming Is Getting Fancy

They built a terrarium, took a spin class.

WSJ: Lucinda Rosenfeld, Author of The Pretty One, on Sisters | Word Craft