Climate change is causing many fruit trees to flower earlier, increasing their exposure to damaging late spring frosts. A study led by the University of Göttingen shows that the plant growth regulator ethephon can delay flowering in Kordia, a sweet cherry variety, potentially protecting blossoms and developing fruitlets from frost. The treatment did not significantly delay flowering in a second sweet cherry variety or two apple varieties, highlighting the importance of crop and cultivar selection. The results are published in BMC Plant Biology.
