re potting a blueberry bush

I'd go for it now, if it was mine. tease out those roots if they are bound.

Blueberries are great when grown in containers.

We moved our four into pots, and they thrived well, but then one decided to die back for some reason! Then we saw the tiniest shoot appearing, so we gave it all the TLC we could, and a new dose of fresh ericaceous compost and it's going to be fine now!

The colour at this time of year is also fantastic!

One was very prolific, so we just moved it into the conservatory to save netting it, and where we could just lean over and pick off a dozen or so when we wanted them!