How to make your terrarium: Step One First, you will need to fill the bottom of your glass jar with a layer of pebbles, this helps with drainage and moisture.

No room for a garden outdoors? Learn how to make your own closed-lid terrarium with step-by-step instructions.

As winter closes in, there’s at least one place where plants will still grow: a terrarium. Here’s how to get started on yours.

If you opted for a closed terrarium, watch for condensation. Take the top off at least once a month to let air into the jar and to remedy condensation.

“Every terrarium I build starts with a drainage layer of leca, or fluvum, at the bottom. It provides space between the bottom of the glass and the plant roots to prevent rot,” Serfilippi says.

Have your assistant begin building the terrarium by layering a 1 1/2-inch layer of small rocks at the bottom of the jar to collect water drainage.

Journalist Brandi D. Addison provides a step-by-step guide on how to build a spooky terrarium ahead of the Halloween holiday.

6. Make a hole in the soil with a wooden spoon or other long handled tool. Plant your terrarium specific plant into the soil. 7. Add ornaments or other decorations such as plastic animals or ...

A variety of terrarium plants by Blue Guava. Now you’re ready to create! 1. Build a one-inch layer of small stones on the bottom (available at Mahoney’s, Home Depot, and pet stores).