My blueberry bush has two main trunks with small branches out from them, I prune the centre growth to keep it open (cup shaped) as that is what I had read up on to do, I haven,t noticed any suckers growing from the outside! but if I do I think I would be pruning these off so as to keep a better shape.

I think I have already answered this one! Don't prune them off, they are a different colour because they are young and vigorous. They will branch and flower next year with fruit to follow.

Please read this....or this could go on forever...Lol