In Jainism, the general rule is to avoid root vegetables because they involve uprooting the whole plant and can harm many tiny life-forms. Ginger and turmeric are rhizomes (underground stems), so they are treated like roots in this context.

Key point about drying: processing (such as drying, grinding, or cooking) does not by itself remove the underlying karmic/sanctioned stance. The concern in most Jain śāstras is about the act of consuming a root that sustains the plant’s life, rather than the form in which it is eaten. So drying the root does not typically make it permissible in traditional Jain practice.

There are some regional or community-level nuances between Digambar and Śvetambar traditions, and individual Jain communities may have different practical rulings. If you follow a particular Jain community or have a guru, their guidance should be respected for precise practice.