The term “terrace garden” can refer to two different types of gardens. In one sense, a terrace garden is a garden which is established on a terrace, roof, or patio, usually in a house where there is limited gardening space. These types of gardens are especially popular in urban areas, and they are sometimes used in restaurants. Terrace agriculture is often the only way to utilize steep land, and some very ancient examples of terrace gardens can be found in South America and Asia.
Terrace gardens in the sense of patio or rooftop gardens can be ornamental or functional, and they are usually designed with container plants to make the terrace easier to manage. Gardeners can also build raised beds on their terraces for gardening. Sun exposure and access to water are two important things to consider when establishing the garden, as is the goal of the garden.