A center gardener generally refers to a person responsible for maintaining the greenery in a public place such as a park, community center or shopping mall. However, there are several synonyms that can be used in its place depending on the specific context. For instance, a horticulturist is someone who works in the field of plant science and knows how to cultivate and care for various kinds of plants. A landscape architect is responsible for designing and planning the outdoor environment, including plant placement. A groundskeeper, on the other hand, is responsible for the general maintenance of an outdoor area, which includes trimming the grass, trees, and bushes. Each of these synonyms can be used to describe someone who is responsible for the upkeep of public green spaces.