"Household plants need nourishment, particularly in the dead of winter when sunlight is limited. Plants love starch, save the water you boiled your potatoes in, let it cool and use it to water your household plants. Can also use hard boiled egg water.
Chinese ground orchids growing in a terrarium. I grow this same color ground orchid, both outdoors in the ground, and in a wide pot, to bring inside to enjoy half the year. I have never thought of growing them in a terrarium.