Answer: A couple possibilities come to mind. Tomato pollen isn't viable much over 90 degrees, so fruits won't set. What have your temperatures been? Another possibility is that if the plants are flowering, but no fruit set and the temps aren't high, the flowers aren't being pollinated at all. There aren't as many pollinators (bees, etc.) around as in past years. Try gently tapping and shaking your plants in the early morning, or hand-pollinate with a Q-tip to see if you can get some fruit to set.
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