Closed terrariums: Generally for tropical plants such as Moss, Orchids, Air Plants - These plants thrive in moist, mostly-shade environments. Keeping the glass closed allows moisture to be trapped creating the rain effect. A closed terrarium can be as small as a sealed thimble sized glass container, to the extra large greenhouses you find in backyards, farms, and city-gardens (dare I say "Viva los Bio-Dome!")....the larger the container, the more you may have to do to maintain the eco-system
- Skeptics say the idea that you can close them forever is a myth, because mold will form and could destroy the eco-system...but I say, and i am sure there are most who will agree, mold IS an organisim, AND plants are resilient and overcome all types of atmospheres.
- Check out this 42 year old