Determine the location for the terrarium. Note the light conditions and temperature of this area. Select plants that suit the location and have similar requirements. Do not combine a plant that prefers low light with one that needs high light. At least one of the plants will perform poorly because its basic needs are not being met.
Most plants require light near a window or supplemental artificial light.
The terrarium should be located within several feet of a bright window but not in direct sun. SOIL Soil must be high in organic matter, clean and well-drained. Most potting soils sold at nurseries and garden centers have been sterilized. Since plants are not meant to grow rapidly, adding fertilizer is not necessary. It is possible to make your own mix by combining by volume one part peat and one part soil conditioning grade of pine bark with one part rich garden soil.