1-5 via Pinterest
I don't know what it is about a Canadian winter that has me thinking green (duh, Joanne), but it happens so naturally and instinctively. I found this lovely how-to for Terrariums on bhg.com and thought I'd share.
Install approximately 1-2 inches of charcoal at base of container.
Fill your container one-fourth to one-third full with the charcoal-and-soil mixture. Gently pack the soil every 2 inches to avoid large air pockets.