25 Easy Terrarium Plants for Open or Closed Glass - The Spruce
Artillery ferns are easy to grow, and they will best thrive with minimal care in a closed terrarium, as this plant loves moisture and humidity.
peperomia
Peperomia pixie lime ( Peperomia orba) is a cute compact plant with bright green leaves. It enjoys medium to high humidity, making it a great choice for open or closed terrariums. This <anchor>peperomia</anchor> is a semi-succulent plant that should be allowed to dry slightly between waterings, so be sure to choose companion plants for your terrarium accordingly. When these plants are happy they shoot unique-looking flower spikes to spice up your terrarium setup.