Deebie, I would do both. Split them in half, and box up the "in-house" ones. I use shredded paper, a 2" layer on the bottom of the box, then a rhizome, another 2" layer, rhizome, etc. Store the box in a dry, heated spot, such as a closet and plant in the spring, after the chance for heavy frost has passed.
Plant the other half, just beneath the soil line and in well-draining soil. Cover them with 4-6" of leaves, oak is what I use. Don't fertilize and let mother nature do the watering. These rhizomes will go dormant and remain so until mid-spring. Shampoo gingers (at least mine) sprout at least a month after my 'White Butterfly' gingers do.
P.S. I will have shampoo ginger rhizomes available for sale (for the first time) in the spring 2013, and will again have the 'White Butterfly' ginger rhizomes available as well.
Ken
