I make miniature gardens using a variety of groundcovers. I was wondering if there was any way to keep them healthy thru the winter indoors in flats. I have them in flats now out on the porch and wonder whether it would be best to dig up a bed and put them all in there or try to overwinter indoors. Under lights? I have sedums, hen and chicks, thyme, rupturewort and irish moss. I would like to be able to make the gardens year round and not have to wait for the ground to thaw and plants to emerge. Thanks!