Posted: March 17, 2022

In this article, Dan Herms, vice president of research and development at the Davey Institute, discusses how climate change is affecting the growing season and what that means for your landscape. 

The changes are subtle, but there’s no doubt that growing seasons are getting longer in most parts of the world. According to the Environmental Protection Agency (EPA), “the average length of the growing season in the contiguous 48 states has increased by more than two weeks since the beginning of the 20th century.” 

spring flowers and trees

While this is a welcome change in some areas, it’s having negative impacts on backyard habitats in other places. Longer growing seasons are affecting the gardening experience across the country, but there are actions that you can take to help your landscape transition smoothly.

​What created the longer growing seasons?

A growing season is a length of time during which rainfall and temperature are optimal to allow plants to grow. Most people measure that time frame from first to last frost dates. Growing seasons are also influenced by air temperatures, frost days, rainfall, and daylight hours.

The cause of longer growing seasons is climate change. “The average surface temperature of the world has increased about two degrees Fahrenheit or 1.1 degrees Celsius since the beginning of the 20th century,” explains Dr. Daniel A. Herms, Vice President of Research and Development at Davey Tree. The increased global temperatures also created a shift in precipitation patterns, causing plants to bloom earlier and first fall frosts to arrive later. According to the EPA, the growing season has lengthened in almost every state, but is increasing faster in Western states.

To continue reading about the changes, click here

The Davey Tree Expert Company provides research-driven tree services, grounds maintenance and environmental consulting for residential, utility, commercial and environmental partners in the U.S. and Canada. Established in 1880 and headquartered in Kent, Ohio, Davey has over 12,000 employees and is the ninth largest employee-owned company in the U.S. This year, Davey celebrates 45 years of employee ownership – Join us and apply today! 

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