Few flowers on my Wisteria

Sizeyuk1

I have had very few flowers on my Wisteria this year, lots of leaves and long runners, I did prune it last year. Can I prune it hard it's got so big,  if so when.

Obelixx

The RHS has a page on their website illustrating how and when to prune a wisteria and I try and stick to the general principles - https://www.rhs.org.uk/advice/profile?pid=242

However, this winter we had quite heavy frosts for this region so I didn't risk pruning it too much but, during and since flowering I have removed any stems that were in my way - one is by a main door to and from the house - or encroaching gutters and roofs or just plain getting too big.   

Mine are really enjoying this year's wet weather and the spring warmth so are producing wayward stems every few days.   I just grasp those stems and pull them to eye height so I can see to prune back to just above a leaf node.   Very thick foliage now so can't be too precise.

Sizeyuk1

Thanks so much I will look on the RHS web site. Last year it was full of flowers so think I may have pruned it wrong.