Answer: Although tomato plants will flower when temperatures are above 90F, the pollen is usually rendered sterile and no fruit develops. You can't change the temperatures but you can sometimes coax fruit to set by using a fruit set spray. It's a growth regulator hormone and is often successful. Lots of brands to choose from in your local garden center. Best wishes with your tomatoes. I hope you have a great harvest!
Q&A Library Searching Tips