Answer: PLANTS

AnswerCrossword Clue
PLANTSStevie Wonder sang about their "Secret Life"
PLANTSComplexes of buildings.
PLANTSMills.
PLANTSGets the garden started
PLANTSFlowers and trees
PLANTSSets firmly
PLANTSGrant Wood's "Woman with ..."
PLANTSWood's "Woman With ..."
PLANTSBotanists' concerns
PLANTSDouble agents
PLANTSLargely green kingdom
PLANTSThey have their own kingdom
PLANTSStevie Wonder "Journey Through the Secret Life of ..."
PLANTSFixes in position.
PLANTSOxygen producers
PLANTSHopes to grow
PLANTSGreenhouse occupants
PLANTSShills, e.g.
PLANTSProduction places
PLANTSGarden variety?
PLANTSHolly and ivy
plantsthe buildings, equipment, etc., necessary for an industrial business; factory
plantsto place firmly
plantsliving organism that has no sense organs and cannot move about
plantsto set in the ground for growth
plantsPLANT, to place in the ground for growing
PLANTSMoles
PLANTSFactories
PLANTSSows seeds
PLANTSFlora
PLANTSMagicians' cronies
PLANTSOxygen providers
PLANTSBuries, as bulbs
PLANTSHerbs and shrubs
PLANTSAssembly sites
PLANTSGardener's charges
PLANTSMorning glory and evening primrose
PLANTSSome housewarming gifts
PLANTSGreenhouse effects?
PLANTSPotted items