Hahaha, that will be the closing title card.

I’ve said this before but I think a theme for Episode IX that you could run with is this idea of “healing wounds” whether it be physical or metaphorical. Mustafar is shown to be healing, apparently. So seeing flowers grow on Tatooine might play into that idea that the world will heal and grow now that this great evil has been destroyed and some kind of balance has been found.

We also see a wilted flower in Rey’s home at the beginning of her journey, so it would be a nice parallel to see a blooming flower in her “new home” at the end, even though I don’t think Rey will be staying there.

There were shrubs and house plants around the homestead in IV and II, but you don’t see anything like that in IX.