I'm glad to hear about the seasonal cycle of ginger in a "natural" climate. My ginger's greens browned and went dormant shortly before Christmas. The tops lasted longer than they did last year, but I was still wondering if I did something wrong.
I knew from last year's experience that they'll grow back again in late winter/early spring, and for now, it worked out because I was able to move the ginger tub away from the supplemental light and give that spot to a large pot of Poinsettias I received for Christmas. I'll just keep it here in the upstairs warmest bedroom along with my two biggest pineapples.
When is your "Spring", imafan? It sounds like that would be the best time for people to start new roots.