I’ve got some stuff rotting down which I’m turning every 2 days or so which I intend to put on the raspberries in March, after 4 months of the worms doing their stuff, which I can visibly detect on a monthly basis in terms of the fresh manure turning blacker, the worms growing bigger etc etc.
I’ve read on the net that you could risk it, but I’m not going to first time around. Raspberries are, after all, the most expensive plants in town!!
Don’t have any blackcurrants so can’t comment about those……