The Collaborative International Dictionary of English v.0.48:

Grower \Grow"er\, n.
   One who grows or produces; as, a grower of corn; also, that
   which grows or increases; as, a vine may be a rank or a slow
   grower.
   [1913 Webster]

WordNet (r) 3.0 (2006):

grower
    n 1: someone concerned with the science or art or business of
         cultivating the soil [syn: agriculturist,
         agriculturalist, cultivator, grower, raiser]

Moby Thesaurus II by Grady Ward, 1.0:

93 Moby Thesaurus words for "grower":
   Bauer, agriculturalist, agriculturist, agrologist, agronomist,
   ancestors, apprentice, architect, artificer, artist, author,
   begetter, beginner, builder, coffee-planter,
   collective farm worker, conceiver, constructor, craftsman, creator,
   crofter, cropper, cultivator, designer, deviser, dirt farmer,
   discoverer, dry farmer, effector, engenderer, engineer, executor,
   executrix, farm laborer, farmer, farmhand, father, founder,
   generator, gentleman farmer, granger, harvester, harvestman,
   haymaker, husbandman, inaugurator, industrialist, initiator,
   instigator, institutor, introducer, inventor, journeyman,
   kibbutznik, kolkhoznik, kulak, maker, manufacturer, master,
   master craftsman, mother, muzhik, organizer, originator,
   past master, peasant, peasant holder, picker, planner, planter,
   plowboy, plowman, precursor, prime mover, producer, raiser,
   rancher, ranchman, realizer, reaper, rustic, shaper, sharecropper,
   sire, smith, sower, tea-planter, tenant farmer, tiller,
   tree farmer, truck farmer, wright, yeoman