1. “a glass container, chiefly or wholly enclosed, for growing and displaying plants”
Once planted, if enclosed, there’s next-to-no upkeep.
Note: Click all terrarium pics to enlarge
I was given the airtight, octagon terrarium (above) decades ago after an illness. I loved it. It needed very little care. Its plastic octagonal bottom contained small plants and its octagonal top lifts off when they need water or cutting back. Ultimately one plant got too tall. I took it out and easily replaced it with a tiny fern purchased at a landscape nursery. It transplanted easily and stayed small, aided by the humid environment. What a perfect gift for young and old. I was hooked.
30+ years later only one (tall) plant remains. It has grown well with fittonia (striped leaf) and ficus pumila quercifolia (miniature oak leaf fig) for many years. I just cut back some fittonia before taking this picture. Terrarium needs little care beyond receiving small amounts of water a few time a year and some cutting back with a small scissors. Fittonia leaves are all less than an inch; ficus leaves even smaller.
Since then I’ve made countless terrariums in varied containers–including this little hinged-roof, leaded greenhouse (made by a retired NJ policeman I was told) and purchased at a local nursery. Not for beginners; it’s not airtight.
Creating an environment with small plants–for relaxation, for friends, and for older people in care centers at holiday time is fun–becomes addictive. The greenhouse terrarium won many “BEST” awards at spring flower shows (with more flowering plants in little pots than shown above). Interestingly maintaining little plants in a terrarium requires less work than a non-terrarium single plant–and delights onlookers (and judges).
PURCHASING PLANTS for Enclosed Terrariums
Smallish, slow-growing plants that like high humidity are a must–when the goal is easy/minimum care for aging parents and older people. Once planted and watered, they have no other watering needs because they create their own environment if their lid/top/plastic wrap is on tight. Only when plants are grown in something big like a covered fish tank, can regular-size plants be used.
Once planted, a terrarium is good to go–no upkeep– except occasional water (plants will look droopy) and pruning. Covered terrariums can’t tolerate direct sunlight. Heat hitting the glass (or plastic) will immediately bake (and kill) the plants. ‘Nuf said.
You can purchase terrariums or….
MAKE YOUR OWN
Any dish or glass-enclosed vessel is fair game as a planter. I found a great glass piece at TJ Maxx for $5 because its top was missing. I turned it into a terrarium by wrapping plastic wrap over the top opening to keep it airtight.
Supplies are simple. The soil is simple potting soil (no added fertilizer, the idea is to keep things small). If deciding to fertilize, 1/4-1/8 strength of recommended amount, once in spring, will do it. I often forget; the plants don’t seem to notice and the flowering ones still bloom.
While I don’t use moss, many people do as pictured in the carefully-selected links below and this Philadelphia Flower Show entry above left. I often add little rocks, wood, and glass or pottery objects. I also line the container’s bottom with charcoal (see links below ). Someone said “it keeps the soil sweet.” I don’t know precisely what that means but it works I guess. Container, charcoal, soil, plants, water, light (but no direct sun) and lid/top does it. How simple is that!