In Jainism, the principle of ahimsa (non-violence) extends to minimizing harm to all forms of life, including the smallest microorganisms. Root vegetables like ginger are generally avoided by many Jains because pulling out the root from the soil kills the entire plant and also disturbs and destroys many microorganisms living in the soil.

However, ginger powder (also known as dry ginger or "saunth") is sometimes permitted, especially among some Jain communities. The reason is that the powder is made from the dried root, and the drying process is believed to have already ended all life in the root, making its use less violent than using fresh ginger. Additionally, it is often used in very small quantities as a medicine or spice.

It is important to note that practices can vary among different Jain sects and families. Some strict Jains avoid both fresh ginger and ginger powder, while others may allow limited use of the powder, especially for medicinal purposes.

Summary:

• Fresh ginger is generally avoided because it is a root vegetable and its harvest kills living beings.
• Ginger powder may be allowed by some Jains, as it is considered less harmful and is often used in small, medicinal quantities.
• The degree of restriction depends on the traditions of the specific Jain community or family.