Weighing in on Incrediball
I've had eight of these for just over a year now. They were 1.6 gallon pots when purchased. I also have a lot of Annabelles.
I'm extremely happy with the Incrediballs, to the point of wishing I could replace all of my Annabelles. (Too many, too mature - would take too much money and too many years for them to catch up in size.)
We had a huge storm come through here a couple days ago. In varying degrees, it ruined most of the Annabelles for the year, despite being staked. True, this wasn't just a hard rain, but still...
The Incrediballs, unstaked, are fine. It's like they said "Storm? What storm?" I love my Annabelles and am continually working on staking methods. As they get bigger it gets a little more challenging. I'm planning a "new improved" staking method for next year, but if I had all Incrediballs, I wouldn't have to bother. That would be really nice!
I'll also mention that the individual Incrediballs have had different habits. Some have fewer tall stems and some more stems that are shorter. I'm sure part of this is due to stems broken in the nursery or on the way home, my somewhat haphazard planting methods, moving one in spring, the age of the plants, and different sun/soil conditions. I didn't intentionally prune any of them since planting, as I wanted to see what they'd do if left alone.
Except on the plant that has the tallest stems, I wouldn't say that the flowers are noticably bigger than Annabelle, but I think they're too young to give a final verdict on that.
Overall, I'm very glad I bought them, and optimistic that they're more than hype. I'd love to hear impressions from others, especially those who also have Annabelles.