[ noun ] someone who takes care of a garden <noun.person>
Nurseryman \Nurs"er*y*man\, n.; pl. {Nurserymen}. One who cultivates or keeps a nursery, or place for rearing trees, etc.
From a nurseryman, Pounds 5.50 would buy you my top Christmas present for anyone who is keen and green: the cream and grey-green rhamnus, which will flourish on a south or west wall.
It may be a good nurseryman's catalogue; it may be an informative issue of Gardening Which? or the excellent volumes from Reader's Digest, published in the 1970s.