Our black berries are just at the stage of little green berries now. It doesn't look like much of crop this year. We had a cool Spring which limits blooming and pollination, but I think the real culprit was the bone dry weather last summer. We got just enough rain when the berries were almost ripe last summer to get a decent crop.
Blackberries fruit on two-year-old canes, I think last summers dryness limited the growth of canes that would bear this year.
If you have ground and conditions blackberries like, you can hardly kill them off. I would not hesitate to bush hog rows through a patch, this will get more sunlight into more plants and probably increase your overall crop. Nor does it kill them to rip up the ground a bit. Actually promotes new, stronger growth in my experience here.
My wife likes to freeze blackberries. She washes them just a little, too much will make them soggy, just get the spiders out :laughing: Then she spreads them in a one-berry deep layer on aluminum foil. Foil, berries, foil, berries until your freeze container is full. When thawed, they taste almost fresh, but have to be used immediately or they turn to mush of course.
Dave.