Stop all fertilizer October 1, and don't fertilize again until April. You do. It want to force the plants to grow when temperatures and light are not optimal. The boston ferns will drop lots of leaves and will basically go dormant if you put them in an unheated garage or basement. Thrown some water on them occasionally, about once a month, but basically forget them. Just don't let them freeze. Put them outside in the early spring, when they won't freeze, and they will come back beautifully. The other plants will shed leaves, especially if light is low. Give them as much light as possible. Don't fertilize or over water.