Answer

During Paryushan, whether you can take lemongrass in tea depends on the niyam (vow/rule) you are observing.

In general, lemongrass is a plant leaf/herb, so many Jains avoid such fresh green items during Paryushan, especially if they are following stricter food discipline.

Explanation

If your Paryushan practice includes avoiding:

• Green vegetables / leafy items — then avoid lemongrass.
• Sachitta food — fresh lemongrass should be avoided.
• Only basic Jain food restrictions — then you should still ask your family tradition, temple, or guru, because practices vary.

Tea itself may also depend on your vow, especially if you are observing upvas, ekasana, biyasana, ayambil, or other tapasya.

Spiritual Understanding

Paryushan is a time to reduce attachment to taste and increase awareness, restraint, and compassion. So if there is doubt, the safer and more spiritually careful choice is to avoid lemongrass during Paryushan.

Takeaway

If you are following strict Paryushan food rules, it is better to avoid lemongrass in tea. If unsure, follow your family/guru’s guidance and keep your niyam with sincerity.