Ursula Schuch, Extension specialist and professor at the School of Plant Sciences at the University of Arizona, explains that extreme high temperatures and late low temperatures continue to accelerate and be a challenge for plants in her region.
“We had some really unusual late freezes in the spring that damaged some plant material, and the persistent high temperatures over 100 to 110 degrees Fahrenheit are a challenge to some of the plant material,” Schuch says.
Based on the trial, one of the top performers was Dodonaea viscosa ‘Emerald Ice,’ commonly known as hop bush. Schuch explains that the ‘Emerald Ice’ plants provided with the lowest irrigation treatment (20%) grew just as well as the plants that were provided 50% and 80%, and there were no significant differences in the growth.