Rose is really special. I always liked her but I could never put together a good deck. Until I realized that freeze decks are too draw dependent for my liking so after going in a different direction I made UL this season playing her most of the way.
Rose is the most disruptive plant hero in the game. Sure sometimes her Transmogrify backfires on you (multiple times I have change a 1 cost zombie into the same zombie or given the player an out of class upgrade like teacher zombie only too see a barrage of tricks) but it can kill a deck's strategy.
I play a Heal Flower deck - Briar Rose, Poppin Poppies, Heartichoke (without environment), Aloesaurus, Astro Vera. I threw two Dark Matter Dragonfruit and my secret sauce card in there and got to UL easier than my other attempts.
The secret sauce - Eyespore.
You should try it out in your control deck as it could lend some synergy. Instant removal with no Zombie restriction and takes care of untrickables. * you cannot take out amphibious and you consume it but it only cost 2 sun (plus if you use a poppy that cost stays at 2 sun).