It is controlled by genetics and the growing conditions, specifically the air temperatures and the humidity. So since you can't control those factors then no, you simply have to be patient. Depending on your location, mid-July is a dead period for blooming and fruit set because of the high heat and humidity.

Dave

First the flower truss has to grow along with the buds. It will take about 10 days from bud forming to flowering. This is under average growing conditions and it also would depend on the variety. Then when the flower opens pollination would depend on temperature and humidity. So not all buds might mature to be a flower.

The bottom line, as Dave said, there is nothing you can do but be patient.

Sey