I live in zone 6 Wichita, Ks. I planted two zucchini plants one is growing and producing around the ground. The other has a thick tall stalk with big green waxy split leaves with large yellow blossoms. It has produced nothing except flowers, and the plant is approx. 4 1/2 feet tall.
Certified GKH Gardening Expert
If you are getting plenty of flowers but nothing produces, then it is most likely due to poor pollination. Hand pollination often helps. Here is more information: https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
If you have blossoms with some that seem to drop off, then it could simply be due to the fact that these plants will produce mostly male (non-fruiting) blossoms early in the season and will gradually start to produce more female blossoms as the season progresses.