Zucchini plants have both female and male flowers, and bees usually do the pollination. However, some years, I remove a male flower that has opened and rub the pollen on the female flower just after it also has opened. This will give me fruit.
To understand the difference between a male and a female flower, look it up on the internet. A female flower has a swollen small zucchini behind it. ... View related article.
