I dug in loads of horse manure last spring, to condition and fertilise a new
shrub/flower border.

I didn't use any other fertiliser because I thought the manure would do the
job. I've just read, though, that manure is not actually a fertiliser, it
is only a soil conditioner. Is that correct? I always though manure was a
fertiliser.

If manure *is* a fertiliser, then can I use a fertiliser as normal this
year?

Thanks.