I can see why you thought it was me Mary Ann, since I have all three. Unlike Mary Ann, the one I would keep is Exactitude. And the reason is that, at least in my garden, it has a lot more vibrant color than the other two when it opens. It does fade as it ages, but I really like that extra color. I do agree that Instructor and Tennessee Gentleman look very much alike. I would keep the one that grows better for you. In my case Tennessee Gentleman is doing better. When it comes time, I am sure I will gift away one or the other too.
