All ginger roots are edible especially if they have been grown organically. Most of the ginger that is specifically grown to produce the edible tubers are tropical and freeze easily so plan on digging them carefully before the freezing weather starts.
When planting ginger from a hand, cover the ginger cuts with soft rock phosphate or fireplace ashes. Let the pieces callus over before planting them at the surface of a good organic potting soil.
