We have this huge, erect-type cultivar - unfortunately I can't remember its name - that used to produce real good (large, round berry) at the place where we used to live. Since we have moved, but within the exact same area, it took me a little while to find a proper, sunny spot for it, where I could use a high enough and strong enough trellis. Once I did, that is right before the 2010 season, the plant did terrifically well, and we had a real good, end of summer crop. Then in the fall, I had to trim it down quite radically because the garden house where the trellis was installed needed a paint job. Now this summer has been quite sunny here and a bit on the dry side. The plant had shot up again to its usual 7-8 ft high in no time, it looked real healthy all summer long, but its flowering has been almost nil! There is probably something basic I don't understand about blackberries... Could I happen to have some biennial cultivar here? Which I should be treating like raspberry?