Answer: greenhouses

AnswerCrossword Clue
GREENHOUSESRelatives of nurseries.
GREENHOUSESGlassy, temperature-controlled enclosures for growing plants
GREENHOUSESThey offer controlled growing conditions
greenhousesA glass building in which plants are grown that need protection from cold weather
greenhousesGREENHOUSE, a structure enclosed (as by glass) and used for the cultivation or protection of tender plants