We have read where it's wise to pull the whole thing up when harvesting the rhizomes. Evidently one boils them for 45 min, then dries them, peels them, and 'powderizes' them.
Some have indicated that the leaves and stems are useful, too but we have not found any commentary about how to use the leaves and stems. Does anyone hereon know?
My spice book does not mention any uses for turmeric leaves.