Blackcurrant bushes can prove to be quite prolific providers of fruit over the summer months, but you can improve your crop further with a little judicious pruning. The main thing to remember is that the branches that produce the most fruit are the newer one. Older branches do produce some fruit but not nearly as much. So pruning is required to keep encouraging new growth.
The time to prune usually late winter to early spring, although can also prune as you pick your fruit in the summer if you prefer. The usual method is to remove one third of the oldest branches cut back to ground level or a strong new shoot. You should also cut back any dead or damaged branches, as well as any that are growing very low. This should be done annually.
An alternative method is to only prune back once every three years, this time cutting back by one third all over the bush. This is not as effective but requires less effort.
Both of these methods can also be used for other currant bushes such as redcurrant and white currant.
With a little pruning you should see your fruit crop increase considerably in the summer months, but increase your yield even further you should mulch with plenty of home made compost or manure.