I live in southwest Nebraska and have a number of 8-10 year old trees that have never bore any fruit. For the past 4-5 years, they have become white with blooms about this time of year. Unfortunately, our last frost date is about May 5. Can I mimic the Florida citrus growers and sprinkle the trees with an oscillating sprinkler? At what low temperature would this be a waste of time? Any other suggestions would be appreciated.
Freezing of Blossoms
The following link is to an article from Iowa State explaining the types of freezes, different fruits critical temperature, and 3 types of frost protection: http://viticulture.hort.iastate.edu/info/06iawgmtg/frostprotectionhandout.pdf