Yay! the waiting for the leaf to open stage...I remember that in my 2nd attempt..my ever hesitant Plumie did not get to open the leaves and just ended the season with unopened leaves.. I checked it afterwards, ..no roots..
So hold that watering..I would wait at least even for one of those leaves to open. Somehow once it manages even one, the rest follows.
Then that plumie of mine, overwintered, and after clearing off all the unopened leaves, it turns out it managed to make 3 tips. But then again, lost the stick..due to wrong timing again after overwintering indoors.