Dynamic Flower Pots

Is there any way to make a flower pot that is essentially a block with an inventory that displays the block in it's inventory above it? It would look like a normal flower pot, but it would be able to display any plant on top of it but shrunk down a bit to mimic the vanilla flower pots.

I understand this is ambitious and would probably require some code if I can do it at all. I just want to know if it's possible before I spend a ton of hours trying to figure it out.