What is the proper temperature for houseplants during the winter months?

FAQ
Question: 

What is the proper temperature for houseplants during the winter months?

Answer: 

Most houseplants grow well with daytime temperatures of 65 to 75°F and night temperatures of 60 to 65°F.  Temperatures below 50°F or rapid temperature fluctuations may harm some plants.  Keep houseplants away from cold drafts, radiators, and hot air vents.  Also make sure houseplant foliage doesn’t touch cold windows.    

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