Before revision: The word is sometimes said to be synonymous with " horticulturist", but that indicates a professional involvement, whereas "plantsman" reflects an attitude to (and perhaps even an obsession with) plants.
After revision: The word is sometimes said to be synonymous with " horticulturist", but that would indicatebotanist" or " a professional involvement, whereas "plantsman" reflects an attitude to (and perhaps even an obsession with) plants.