David, I wish I could give you some direction with the White Butterfly, but my knowledge is only based on how I grow it here in Mississippi. All my ginger goes completely dormant from approximately December through February. Mine is still in bloom here but when we get the first heavy frost, it will all begin to die back. I have never tried to grow the White Butterfly inside. I found that the Shampoo Ginger will not take extreme cold (I count mid to low teens as being extreme
) and have potted all that variety. I will move it all to a greenhouse before the weather turns freezing. I will plant it back into the landscape in March/April.
