whacking his under-producing apple tree
I have a wisteria that’s over 20 years old. It has never flowered. Someone once told me to hit it with a bat for about a week in the spring and it would flower the next year. I tried it for a couple days, then would forget to do it. It has something to do with the plant getting stressed and producing more flowers/seeds as a survival mechanism. At this point I just want it removed. They can be damaging to your structures.
Wisteria can tear down your house! I’d never plant it against my home. Maybe on an outside structure - or on the neighbor’s fence at best. ;)