I have a 75’ row of Kiowa blackberry plants. Half of them have been in the ground and produced great. The other half has been in the ground for one year - and while they didnt produce - they grew some great primocanes. The two year old plants, while providing a lot of fruit - hardly produced a primocane. I am assuming the newer plants will produce great next year, but the older plants not so great?

Above are primocanes from two year in the ground blackberries

Above are primocanes from blackberries planted last year
Are they an every other year deal?

Above are primocanes from two year in the ground blackberries

Above are primocanes from blackberries planted last year
Are they an every other year deal?