Confidence votes 27.8K. The study of plants is called botany, the person who studies plants is called a botanist. Botany is a field of Life Sciences which looks at the classification and physical characteristics of plants.A person who studies the interaction of plants and animals in an environment is called an ecologist or environmentalist.A person who grows plants is called a horticulturist.otany is a field of Life Sciences which looks at the classification and physical characteristics of plants. A person who studies the interaction of plants and animals in an environment is called an ecologist or environmentalist.