Woah! You can grow these berries in pots? I’d have thought the way the roots shoot out that they’d become root bound very quickly. Are these huge containers and do you have to prune the roots frequently? From the little I know about berries they’re heavy feeders and need a lot of space… I guess I’m going to need to rethink that
I don't know if you can... but I do it anyway

and they seem to thrive... and I get very decent yields from them...
I grow mostly in 18-20 gallon wooden containers, depending on how much they are filled.
The only exception is these gooseberries, they are 3yo and in 7g containers still, but I want to up-pot them this summer as they've gotten huge... the picture doesn't seem to reflect the actual size quite well... each is about 4' wide...
I went to a haskap farm last summer and got a chance to meet and speak with the owner... he gave me a tour of the farm, the winery... I asked about the yields of his in-ground plants. They were the same age as some of mine... his is a fairly new farm... happy to note that the yields from those plants were on par with what I was getting from my potted ones at the time...
some of my haskaps...
I grow all my berries in pots... The oldest I have is 5 years old, and I haven't root-pruned it yet. Not sure if it's needed, to be honest... I will be monitoring how my older ones perform relative to the younger and decide if root pruning is needed...
They say figs need root pruning after about 3 years and such... I don't buy it... I just can't... not after seeing this:
From Facebook's 'What the Fig' group...
Original description
"Everyone should have one big tree
This Celeste is over 20 years old, with hundreds of sweet figs every year. It has always grown in the same pot 19” H x 22” W. Its roots have never been pruned, and neither has the canopy. Every week it gets a handful of three different brands of organic tomato fertilizers (I switch off between Burpee, Espoma, and Jobes) and lots of water everyday! On a hot day it gets water two times. I think it looks prety happy! I‘m in North Illinois, Zone 5."