I added sand because it helps with drainage, and because I’m creating an ocean theme for this particular arrangement.
Visually, you can create contrast by layering different colors of sand and stone – like these dark rocks and light sand.
Next I put some stones along the side to break up the scene and make the green plant I’m going to put in stand out.
This is an air plant. It’s ideal for terrariums because it doesn’t have roots. You can maintain it by spraying it with a water squirt bottle every couple of days.
You can also create a forest theme for your terrarium by using succulent potting soil instead of sand. For this theme I use a slate backdrop to set off this agave.
Haworthias are also great for terrariums because they like lower light conditions and need less water than most other succulent varieties.
Overall we recommend using soft succulents because they grow better indoors. Only consider using hardy succulents if they are outdoors or near a bright window – otherwise the plants might stretch.
The right succulents can live happily in a terrarium for months. This arrangement is five months old and the plants are still healthy. If they’re too overgrown for your taste, you can simply trim them back with gardening scissors.
If you want specific recommendation for plants and other products that work well with terrariums, check out the terrariums page on our website.