Calibrachoa grows as an annual in its native South America. In colder areas, most gardeners grow them as summer annuals. Cuttings of this plant are an easy way to make more of them. This means you can cut off pieces of the plant, get roots in them, and grow them indoors in a place with a lot of light. Calibrachoa is one of the plants that die back in winter; you can keep them safe by bringing them inside during the winter.