55N latitude is pushing up against the Northern limit of hops growing, I'm not sure if you're much further North than this, but if you are, you'll have trouble.
This isn't to say that the hops won't grow, you'll probably get really big bines and leafy growth, but cones might be a problem. The signal to start making cones depends on a certain number of hours of daylight, this signal comes later in Northern climates and frost tends to come before the hop cones mature. My Cascade crop this year in Edmonton, around 53N latitude, finally ripened in early October and we've seen frost and snow some years by then.
Hope this helps
Turn up the good, turn down the suck!