Q.Tomatoes
What causes tomato plant to produce blossoms, but they fall off producing no tomatoes?

Certified GKH Gardening Expert
Either a lack of water or a lack of pollination is the culprit. Increase water and these articles will help you with the pollination: https://www.gardeningknowhow.com/edible/vegetables/tomato/pollinate-tomatoes.htm, https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm, https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm