I've overwintered potted hosta here in Central Illinois for the past 5 years and have only lost those which were not growing good before winter came. I kept them in an unheated garage and would water them lightly so the soil doesn't dry out & cause them to die that way. This winter I've put most of them on the front porch which is covered but not enclosed. My DH suggested putting a tarp over them but am concerned about mice getting into them if I did that, so they are sitting there on the porch. I'll keep an eye on them & if they get too much moisture when it rains or snows, I'll move those inside the garage.
