I agree with the basic maintenance thing being a chore, but I understand where OP is coming from. So if one person out of the pair decides with previous warning that they want to plant a bunch of stuff then it’s their responsability to take care of them.

In my situation for example, I live with my partner in an apartment, and the vases are his to maintain and take care of. We’ve talked about where we would live next and my parter wants a yard and I don’t. So I’ve forewarned him that if we have a yard in a future house it belongs to him, and any decisions to move to a house with a yard come with that agreement. This is all very different situation to living in a house with a yard already, or not having the choice when moving for some reason.