I have a u. macrorhiza plant I've been growing all summer. Now that the days are getting shorter, would it be good to put it in a ziploc bag full of water in the fridge to "winterize" it? In the wild these get snowed over, so they don't get a lot of light and the water is very frigid. Would it be best to mimick these conditions? If so, is the fridge the best option or would outdoors be better (we are still getting 70-80 F outdoors almost every day)?