How much water while dormant?

I am letting two of by brugs go dormant this year (In the dark and cool garage). I've never don this before. I know I should cut back on water but I don't know how much. I overwinter fuchsia in the garage and all I give them is about a half cut of water a month, just enough to keep them from drying out completely.
Do any of you know how much water they need while dormant?

Tish,

Mine don't go dormant in the greenhouse so I don't have any personal experience with overwintering dormant Brugs, but from what I have read, water sparingly — keeping the soil barely moist. If you have been successful in keeping your fuchsias alive over the winter, use the same method on your Brugs. It should work.

Thanks Bettydee. I assumed that was the case but Brugs are so picky about environment I wasn't sure.