Cool, never heard of it. Niwot was developed by one of us, an amateur. Well some of us! Nourse has some now. You have to call.
Mine grew 2 feet this spring from a 4 inch seedling. Impressive!

Drew51,

You're the one that made me aware of the existence of any primocane fruiting blackberry. That of course was Niwot. Thank you.

Hopefully this 2nd one will be around for us. I emailed the breeder of Niwot, and he helped me with growing from seed. I actually have 3 seedlings growing. I failed a number of times, about time! I ate my first raspberry today! The season has started for me!