Some vines grow so fast they require a new zip code by the end of summer! Vines like like these Hops or especially Woody vines like Wisteria need to be showed who’s the boss.
That’s right, a vine will be content to grow and grow in lieu of producing blooms if you’re too nice. If planted near lawn areas, they often get too much residual nitrogen from lawn feeding giving them a “kick in the plants” to produce more foliage. Try some triple super phosphate, some root pruning with a shovel and hold back on the watering a little bit. Some stress and enough sunlight might get that vine to cooperate with some flowers!