Q.hostas
I received three plants in a pot as a gift. What do I need to do to keep them growing until I can plant them outside in Minnesota?
You can either keep them as houseplants or let them go dormant until spring, as described here:
http://www.pennlive.com/gardening/2014/12/do_potted_plants_need_light_in.html
Indoors, provide them with a sunny window, and add a grow light if you don't have much light coming in through the window. Water sparingly, but enough to keep them from wilting. Plants don't use as much water in winter as in summer. Avoid fertilizing until they're planted and beginning to grow in their new location.