If you can wait a couple months, I have Attraction, Bi-Color, Black Night, Pink Delight, Royal Red, White Profussion, Nanho Purple, and Honeycomb. My butterfly bushes are still at ground level for the year. I cut them down every year. I wouldn't suggest Honeycomb for your zone though and you may have to check on the rest. I do not know which ones are hardy to zone 4, I just know Honeycomb is boarderline in my zone. I do not need any more butterfly bushes though and I have no idea how to make butterfly cush cuttings.

Are you looking for cuttings or only rooted plants?

I have been growing BBs for 5 to 6 years without issues. Last year I started quite a few from seed and planted at least 20 on the property and have another 15 in holding beds. Some even flowered in their first year. I just 'scratch' checked them all today and they are all coming back. No mulch and I don't feed them. When I first tried them I grew 4 from seed. These are the 5 or 6 year ones. Three are still with me and the fourth died a year ago. It was just in the wrong place. This year I have sown more seeds. Hoping to get particular colours and if I don't, well I always have 'takers' for them. :O) Of course, these are not dwarf BBs but the 7 feet tall ones. Much tougher.

I have both âÂÂPeacockâ and 'Adonis Blue' since 2006. They're both definitely dwarf. Very impressed with âÂÂPeacockâÂÂ. The flower pinnacle rivals that of 'Pink DelightâÂÂ. Yet the plant size is 1 foot shorter than 'Pink DelightâÂÂ. I cut all my butterfly bushes to ground each spring. âÂÂPeacockâ grows to about 3 feet (or less). As far as flower size concerned, there's nothing write home about 'Adonis Blue' (similar to 'Nanho Blue'). 'Adonis Blue' is also a week grower for me. 'EllenâÂÂs Blue' is a better grower (full plant habit), but of course it's twice of the plant size.