'Horticulturist' definitions:

Definition of 'horticulturist'

noun

An expert in the science of cultivating plants (fruit or flowers or vegetables or ornamental plants) [syn: horticulturist, plantsman]

From: GCIDE

Horticulturist \Hor`ti*cul"tur*ist\, n. One who practices horticulture. [1913 Webster]