horticulturist
person who works and conducts research in the science and art of growing flowers, fruits, vegetables or ornamental plants
en-GB/ˌhɔːtɪˈkʌlt͡ʃəɹɪst/
en-US/ˌhɔɹtɪˈkʌlt͡ʃɚɪst/
person who works and conducts research in the science and art of growing flowers, fruits, vegetables or ornamental plants