Very hard to grow and will get a lot of green streaking when detached from the main plant.
From my experience of growing White Trouble which is all white until later in the season, I would suggest that you give the plants direct LIGHT (not direct sun). They will have to develop chlorophyll before they go dormant in order to build strength for next year. I also fertilize the White Trouble with osmocote with minor elements, as I do the other hostas [Cornelia Holland].