Reporting
The male flowers come first

The male flowers come first and will fall off. About 7 to 10 day later, the female flowers will show up. Then, the bees can pollinate.  If you want to speed things up, you can take a Q-tip and move the pollen from the male flower to the female flower in the morning when both flowers are present and open.
If foliage is going down from powdery mildew, this may help with ripening, too.