These are the female flowers that are falling off? It is natural for the male flowers to do so, once they have finished releasing pollen. The female flowers that fall off without developing fruit can be because of poor pollination—either there were not enough pollinators (wet or windy weather can deter them), or the pollen itself was poor quality, possibly due to very cool or hot temperatures. In the morning, you might try transferring by hand (using something like a tiny paintbrush or a Q-tip) the pollen from the male flowers (those with a smooth stem under the flower) to the top (stigma) of the center part of the female flowers (those with a small bump at the base of the flower). Also, make sure that your plant is watered evenly—providing mulch can help. Sometimes zucchini will produce lots of male blossoms and only a few female blossoms early in the season. Later, female blossoms will appear in larger numbers. It could be that your plant will catch up soon. Normally, with good pollination and overall good plant health, there will be a few zucchinis growing at the same time.
These are the female flowers that are falling off? It is natural for the male flowers to do so, once they have finished releasing pollen. The female flowers that fall off without developing fruit can be because of poor pollination—either there were not enough pollinators (wet or windy weather can deter them), or the pollen itself was poor quality, possibly due to very cool or hot temperatures. In the morning, you might try transferring by hand (using something like a tiny paintbrush or a Q-tip) the pollen from the male flowers (those with a smooth stem under the flower) to the top (stigma) of the center part of the female flowers (those with a small bump at the base of the flower). Also, make sure that your plant is watered evenly—providing mulch can help. Sometimes zucchini will produce lots of male blossoms and only a few female blossoms early in the season. Later, female blossoms will appear in larger numbers. It could be that your plant will catch up soon. Normally, with good pollination and overall good plant health, there will be a few zucchinis growing at the same time.