There are many super shops in Frankfurt where you can buy fresh Indian Vegetables. The price always depends on shop to shop. If you want to get fresh vegetables at the cheapest rate, you can choose SeeLand supermarket where you can get different types of grocery items.
Currently, a new year special offer is going on at SeeLand Super Market where you can buy any kind of Bangladeshi Vegetables only at 5 euro.
Check the available products here: https://seelandonline.de/product-tag/bangladeshi-vegetable/
This offer is only available from 6-16 January 2022.
Cheapest Vegetables in Frankfurt