Tree of emotion question

Hi there, so I am busy updating all my collection rooms. The last room that needs updating is the garden rooms and ofcourse once that is done the full collection. I am however stuck with the tree of emotion berries. I have planted each individual one because if you get a tree to perfect stage only one berry is perfect the rest are not, so now I am trying to get each tree to perfect and then graft each tree onto each other to hopefully get a tree full of perfect berries, my poor sim is gardening 24 hours a simday LOL. Am I wasting my time and all berries remain normal stage or will I somehow someday get my perfect berries ;)