As one who has never had an Itoh peony and doesn't care one way or the other, this discussion is both educational and entertaining. Exposure to different opinions and different experiences makes a better gardener. The problem with any cloning is the quality of the source material. Poor genetics will be cloned just the same as a good genetic source. A superb plant will produce superb offspring just as a diseased or malformed plant will produce very poor quality offspring. But, the process is gaining support and one day the huge fields of nursery plants will be replaced by a row of petri dishes.
