I bring my gingers inside due to the rare cold (sub 0) temps that we get some times. I have sun available to them through sky lights and have had my blue ginger bloom early in December and my spiral is presently blooming.
All the others that had bloomed earlier in the season were trimmed back and let to go in to dormancy. They appear to do fine every year. Come Springtime (just around the corner) out they go, nothing in the house except the orchids.
