Answer

In many Jain traditions, basil, especially tulsi, is avoided in Ekashna because it is treated as a fresh green herb and is included in the group of foods that are kept out of a restrained meal. Pudina is sometimes allowed in some family or local traditions as a small seasoning, but it is not a universal Jain exception.

Explanation

Ekashna is meant to keep food simple, light, and disciplined.

• Fresh green herbs are often restricted because they are considered more जीवित and stimulating.
• Tulsi/basil is commonly avoided in such observances.
• Pudina may be permitted in some households because it is used very sparingly, but stricter Jain practice may avoid it too.

So the difference is usually about tradition and level of strictness, not a separate core rule of Jain Dharma.

Spiritual Understanding

The purpose of Ekashna is not only to eat once, but to practice:

• Ahimsa
• Self-control
• Simplicity
• Less attachment to taste

The stricter the observance, the more one avoids fresh greens and aromatic herbs.

Takeaway

If your tradition allows pudina but not basil, that is usually a custom-based rule. For a strict Jain Ekashna, it is safest to follow the guidance of your family or guru tradition.