Even if you’re not changing the temperature on your thermostat all the time, the temperature around windows and heat sources (like baseboards, radiators, etc.) can fluctuate throughout the day. This isn’t great for your plants, so Pangborn recommends moving your plants away from areas like that, “in order to make sure the average day temperatures range from 65 to 75 degrees Fahrenheit, and at night, no lower than 50 degrees Fahrenheit.”