Short answer: In Jainism, garlic is generally avoided.

Why:

• Jains practice ahimsa (non-violence) very stringently. Root vegetables, including garlic and onion, are commonly avoided because their harvesting kills the entire plant and can involve harming many small life forms living in the soil.
• Root vegetables are considered to carry more potential for harm and impurity in ritual and dietary practice, so many followers choose to abstain from them.
• There are no major doctrinal differences that would make garlic permissible in Jainism for Digambar or Shwetambar traditions; both traditions tend to discourage root vegetables, especially for those who take vows or seek strict practice. Individual households may vary in application, but the mainstream stance remains avoidance.

If you’d like, I can summarize how this topic is treated in specific Jain scriptures or traditions (Digambar vs. Shwetambar) and provide simple guidance for everyday practice.