A terrarium or dish garden is a collection of plants grown in a single container, one which is usually either completely or mostly enclosed. These gardens are an excellent place to grow plants which require a high degree of humidity.
Dish gardens serve the same function, but differ in that the container is usually open.
Gardens grown in a dish or terrarium are of a temporary nature and are not intended to last forever. Most of the plants in the container will eventually grow too large, requiring a transplant into their own container. Also, it is not uncommon for one or more of the plants to die, spoiling the aesthetic effect of the planting. The growth of the plants within the garden can be prolonged by careful planting and maintenance procedures, but these will not become permanent gardens. Containers designed for use as a terrarium or dish garden may be purchased in stores and garden centers, or can be created from a variety of household items.