Yes, they're indoors, but that doesn't mean houseplants get a pass on harsh winter conditions. They face a set of inhospitable and conflicting circumstances. They're likely perched on a windowsill, where it can be too cold and drafty. And they're probably over some sort of central heat delivery system, so it can be too warm and too dry as well. Days are short and dark.And according to Cooperative Extension's Amy Ivy, it can even be too bright. What to do...? [full story]