I purchased a bunch of these in the beginning of April this year and got planted right away, they are getting plenty of sun in my zn 5 (central Indiana) and I added peat moss and compost to the soil prior to planting, we had some freezes from then until now but nothing major, all of them are doing, and growing, really nice, BUT... one of them has this thing going and I am not sure what it is, I don't think that it was like that when I purchased as I really check each plant thoroughly before putting it in my cart, I noticed something about 3 weeks ago and my first reaction was to trim the problem and let it recover.... well, it's happening again and I don't know what to do... one side of the stems are turning black, like black... and there are no leaves on them, and inside the plant, it has these black things, it's not mildew, but the black things could be just dead berries I guess, none of the other 8 plants have this so I am really lost here trying to figure it out.


Help!

(see pics in first comment)