I agree with Sooby. Here in Z:5 I still have plants to put in the ground. They have been outside. Below freezing temps are expected overnight. Going to do my best today to get them in the ground and mulched. I said that to say it will be easier to put them outside than to try and keep them
alive in the house all winter unless you have time and means to do so. Just pile on the mulch
I have planted daylilies around here in November in years past that survived. I believe that they will be fine if they are not sitting in a soggy area.