I have a white wisteria. Always flowers, but it does not seem to sprout from the stem which is getting longer and longer.
If I cut most of the top growth now, do you think this would persuade it to sprout further down the stem, so just kill it.
have a good read of the RHS pruning book!!, they really give good instructions for pruning wisteria.
http://shop.wisley.co.uk/product_info.php?product=SEARCH&dpi=9781405315265