A terrarium would be a good choice if you don't have time for maintenance or if you have cats that love to nibble on your house plants! These miniature self contained mini greenhouses efficiently recycle moisture. The plants draw wr from the soil which is released into the terrarium atmosphere by transpiration, condenses on the glass w
s and returns to the soil. Occasional top ups are
that is needed to replace the sm
amount of w
r lost through the cap.
Terrarium History
Nathaniel Ward, an amur botanist, made the first terrarium in 1827. He became concerned about the notorious pollution present in London air at that time on the butterfly cocoons he was studying he placed them in glass jars to protect them. After a few days he found ferns happily growing in his glass jars and realised the glass jars were ideal environments for growing moisture loving plants. His idea spread rapidly and terrariums became very popular especi
y for preserving exotic plant specied brought to England from abroad.
Choosing Plants
Suitable plants for your terrarium are those that are moisture loving and do not grow too big. The location where you will place the terrarium will dict the amount of natural lighting that it receives and plants can be chosen accordingly. For a terrarium receiving low levels of natural light choose mosses, lichens and ferns. More choices are available for terrariums receiving moder
to good natural light including butterwort, Irish moss, philodendron, pitcher plants, jade plants, Venus fly traps and asparagus ferns. Flowering plants, such as African violets and geraniums, in a larger terrarium, can also be included. Terrariums should not be placed in direct sunlight. You can also add other decorative items such as terrarium (or aquarium) ornaments, driftwood or pine cones. Natural objects should be regularly inspected as the moist conditions can lead to rotting.
Setting up a Terrarium
Add a thin layer of gravel or pebbles to provide drainage covered with some activd charcoal which can be brought from garden centers or aquarium shops. The charcoal will help keep the air inside the terrarium clean. The next layer is sphagnum moss which will keep the next layer, the soil layer, in place. Special mixes of soil for terrariums can be used or use a mixture of two parts potting compost, one part coarse builders sand and one part leaf mold. Beach sand contains impurities that can be harmful to the plants and should not be used.
For a terrarium with live animals add a show dish of w
r. Now add the plants. Depending on how the terrarium will be viewed you can arrange the plants. For a terrarium that will be viewed from
angles the t
est plants should go in the middle with the sm
er plants around the edges. If the terrarium will only be viewed from one side the t
est plants can go at the back with the sm
est in the front. Be sure to keep the leaves away from the glass w
s as moisture on the w
s will drip onto the leaves and cause them to rot.
Add any decorations, add wr to the soil and close the lid.
Maintenance
Inspect the terrarium regularly to check the moisture levels. If it appears too dry use a mister to add wr but do not over w
r or the plants could rot. For a plant terrarium nothing more is needed.
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