In Jain Dharma, food rules are based on ahimsā (non‑violence). So we mainly avoid foods where more lives are harmed.

1. Vegetables Jains do not eat daily

All root / underground vegetables (kand-mool): Because uprooting them kills the whole plant and many tiny lives in the soil.

Common examples:

• Potato
• Onion
• Garlic
• Carrot
• Radish
• Beetroot
• Turnip
• Sweet potato
• Yam, suran
• Ginger
• Fresh turmeric
• Taro (arbi)
• Cassava / tapioca
• All similar tubers, bulbs, rhizomes, corms

These are avoided in both Śvetāmbara and Digambara traditions, especially where traditional maryādā is followed. ( jainknowledge.com)

2. Other items many Jains also avoid (though they are not “vegetables”)

Because they contain or support many lives (anantkāy) or grow in impure places:

• Mushrooms, fungi, yeast products
• Sprouts (new life has started)
• Fermented foods (curd, buttermilk, vinegar, idli/dosa batter, yeast bread, etc.)
• Honey

These are more strictly avoided in Chaturmās, Paryushan, and by stricter sādhak‑type households. ( jainknowledge.com)

3. Extra restrictions in special periods (Paryushan / Chaturmās)

During these times, many Jains also stop:

• Green leafy vegetables (saag): spinach, methi, coriander leaves, etc.
• Sometimes certain multi‑seeded or insect-prone vegetables (like brinjal, cabbage, cauliflower) depending on local tradition. ( jainknowledge.com)

Outside of such periods, most families permit above‑ground non‑leafy vegetables (lauki, tori, bhindi, etc.), while always avoiding roots.

For a simple explanation of Jain food rules and kand‑mool, you can read more here .