You should have had primocanes appearing in March. If you have none by July you wont have a crop next year.
Post some pics in the Blackberry Raspberry and Hybrids thread and lets see whats going on.
Lets see pics of the base and how you manage the row etc if possible.
Could be Crown Gall.
Plants dont need fertilizer to stimulate primocane growth… a bare root cane will form primocanes in zero medium just from the stored energy from the roots.