What is a terrarium?
Traditionally, it's a spherical glass (or other transparent material) container for plants. Nowadays, any mini garden in a glass container are called terrariums. It doesn't matter if the opening is big or small. But, the plants should truly be contained within the vessel.
Try this terrarium kit from Nordstrom. It's only $12. But, you'll have to grow the sedum succulents from seeds. And, it doesn't include the container.
Here are some options for glass vases from CB2:
- Simple globe - actually for candles, but can work for a terrarium, too
- Hanging globe with slight teardrop bottom - looks ornamental
- 3 hanging globes - it looks like a pea pod