https://te-food.com/
This is blockchain usage for food traceability - used by big companies in Europe (Auchan). Take a look this might give you inspiration, I think the idea can go beyond food
A noob question, but why Blockchain is required for this? Why can't this be done with normal databases?
Blockchain has public write rules and most of the time data is written once and is trustworthy due to decentralized nodes, you can also find who wrote and when. This is like a database but much more transparent by nature. When it comes to find where your food has grown, and how it came to your shop, this is useful