21 of the Best Native Vines for Your Landscape Gardener's Path Tom Pot 12 Best Plants for Fall Planters and Container Gardens Shiplap and Shells Potting Mix vs. Potting Soil: What's the Difference and When to Use Each Myth: Terrariums are high maintenance. Truth: They're literally designed to take care of themselves. Once it's built right, a closed terrarium recycles its own water. You might water it once a month.