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Your diagnosis seems correct.

Your diagnosis seems correct. The flowers were not fertilized because of the lack of bee activity. This can be influenced by rain and weather conditions. To aide pollination. With a Q-tip, take off the pollen from the stamen of the male flower and brush it onto the female flower's stigma in the center. You could also pluck a male flower (the one without the bulb or ovary at its base), strip off the petals, and use its pollen-covered stamen as a brush. Do this all in the morning when both male and female flowers are open. Next year, get some bee-loving flowers for natural pollination!