This article gave good information on planting the ginger root, then went into the harvesting of roots when mature. Will the plantings from 'grocery store' roots produce fragrant flowers?
Planting ‘Grocery Store’ Ginger Root
Certified GKH Gardening Expert
Ginger grown for flowers and ginger grown for their roots are two different varieties. The kind that produce fragrant blooms have a less flavorful root and the kind that is grown for its root has rather poor flowers. The grocery store variety will flower, but it will not be as pretty or fragrant as a a variety where they were bred for that.