I don't know if you know about these things, but you can actually buy cards that you can plant and they will grow plants.
I love the idea, but am not sure about how well it would work. Would you really plant a card? I am not sure I would. I also would love to give them, but not sure if people would know what to do with the card. Even if you told them they were plantable, would they know how?
I have seen some beautiful cards, and they are very sustainably made. For that, I love them. Yet, I am still not sure about the planting ability of them. What do you think?