Similar to how you can now pave with brick (and gold) to liven up the village landscape a bit, and with the introduction of a bunch of new floral items as curiosities (bluebells, edelweiss, snapdragons), you should be able to take flowers and plant them on a tile purely as a cosmetic thing. Lining your areas with flax and poppies is nice, but adding more options (now that we've got the new flowers) would be awesome as well. Planted tiles would look similar to planted flax/poppies now, but with color/appearance differentiation depending on the plants of course. Planting the flower would take one of the item to do, and you'd lose the item with no ability to get it back, so decorating with bluebells and edels would be costly but also rewarding (kind of like paving with gold).
Just trying to think of ways to liven up the scenery since there's very few decorative options and eventually everything just kind of blends together. Colored bricks was a nice touch, but cosmetic plants would be cool too.