Looks quite healthy, so doubt lack of water and fertilizer are an issue.
If this is dying back severely in the winter, that might be affecting it.
Also, if fertilizer is mostly Nitrogen (and I am thinking manure is mostly nitrogen) that may be encouraging lush vegetative growth rather than fruiting. You might need to use something that is more balanced (has N-P- and K, not just N) The P and K are more condive to fruiting and flowering.