I planted over 1000 ft, 23 var.in Apr.and have only gotten a couple of meals so far.
They are growing real well
Some have reached 12 ft.and still climbing
The hot weather here,[mid 90's +] have slowed down pollination
This may also be your problem
I expect them to really start producing as soon as it cools off some
I use a small amount of 0-10-10 at planting time
I treat the seeds with inoculant before planting
I also put out mollasses to feed the microbes in early spring
Charlie