IT is almost impossible to find Black Raspberries these days. Why? They are my favorite fruit.

I haven't seen black raspberries since I visited Wisconsin in my childhood. I loved them!

I don't even know what they are.

I have black raspberries (wild) on my property ,They grow and multiply like weeds in the edge of the woods. I have been told they get a mosaic disease and I should not bring them into the garden with my other bramble berries .
They are much smaller than the red and I would guess harder to raise on large farms for profit. They are however very tasty, and if one can stand the mosquitoes , worth picking. They ripen around the first of July here and it always seems to be prime mosquito time.

We have them too, and the nurseries sell them here. They do well in our heat, and make it through cold dry winters.
Loganberries are the same way--very hardy here.
It could be a midwestern thing with the black raspberries!

Starkbros.com has black raspberries, and many other berries, including boysenberries, which are hard to find, too.

We call our black raspberries Black Caps here in Oregon. We have them growing wild everywhere. I transplanted some in my garden and my dog Jack loves to pick and eat them

Your Jack looks just like my Brandy!
I saw her eating mulberries the other day. Some summers, she sits under the apple tree and eats apples. She puts her paws on each end and munches her way around, the way a person would. I fenced in my green beans to keep her away from those!