Posted: 21/05/2015 at 13:17
What can happen is the top growth dies (esp in bare root plants) and new growth come up from the roots further away. This may take till next year.
You really should think about barriers to their roots. I planted various varieties a few years ago and this year new Raspberry plants came up several metres away in other borders. People think Bamboo is bad but Raspberry and Blackberry are worse. Strawberries spread like mad but at least they are easy to spot and move.