The article explores the implications of earlier spring arrivals due to climate change, highlighting its effects on agriculture, ecosystems, and human health. It discusses how earlier springs impact crop production, pest activity, migratory patterns, and ecological balance, emphasizing the need for climate action.
Joe Lau farms row crops in St. Joseph, Missouri. Lately, he notices more extreme weather. Seasons feel warmer year-round. Storms dump three inches of rain instead of a predicted quarter-inch. Pests pressure his corn more than before. He also sees spring arriving earlier.
The USA National Phenology Network shows a striking trend. Spring arrived three to five weeks earlier than the 1991–2020 average across much of the central U.S. In southern Midwest states, it arrived two to three weeks early.
“I have allergies bad,” said Lau, who also grows soybeans. “And this year in particular, it’s hit me hard. It’s wild that we are talking about allergy issues in winter, but that’s technically the reality of it.”
Last month, Climate Central published an analysis. The nonprofit group found spring trending earlier from 1981 to 2025 across most of the United States. On average, leaves now emerge six days earlier than they did in 1981 in 212 out of 242 major U.S. cities. In St. Joseph, spring leaves tend to arrive two days earlier.
Where Are Spring Leaves Arriving Earlier?
Climate Central used open-access data from the USA National Phenology Network. Volunteers and researchers study seasonal events to determine ecosystem health. They track when migratory birds arrive, leaves emerge, and fruit ripens.
The analysis relies on the network’s first leaf index maps. These models predict the start of spring using temperature data. They also track the first leaf emergence for early spring plants like lilacs and honeysuckle.
“That very leading edge of spring is drifting earlier,” said Theresa Crimmins, the network’s director. “It has drifted, in some cases, a whole lot earlier in just that last few decades.”
Many Mississippi River basin cities see earlier springs. Hazard, Kentucky, sees leaves arrive 11 days earlier. Memphis, Tennessee, and St. Louis, Missouri, leaf out seven days earlier. New Orleans, Louisiana, is two days earlier.
An exception exists in the Northern Rockies and Plains region. Spring temperatures there have either cooled or warmed slowly since 1970. Kaitlyn Trudeau, a climatologist with Climate Central, explains this variance. She points to climate controls like latitude, elevation, wind patterns, and ocean currents.
“All of those different factors really dictate what your local climate is like generally,” Trudeau said.
What Does Early Spring Mean for Ecosystems?
The early arrival of spring causes widespread impacts. People with seasonal allergies face more pollen because plants produce it longer.
Warmer temperatures also prompt birds to migrate too soon. About half of all North American migratory bird species follow the Mississippi River. When birds migrate early, they miss the peak abundance of food. They fall out of sync with insects or the flowers they pollinate. This disrupts other species as well.
“That can cause this ecological mismatch,” Trudeau said.
Financial Risks for the Agriculture Industry
Earlier springs put the agriculture industry at financial risk. A hard freeze often follows an early leaf out. This event, known as a false spring, damages corn, soybeans, and specialty fruits.
In 2017, a hard freeze devastated the southeastern United States. It destroyed fruit crops like peaches, pears, and blueberries. The freeze also ruined grass meant for livestock. This disaster caused more than $1 billion in losses, according to a report from NOAA.
“We are so dependent upon what happens in the natural environment,” Trudeau said. “When things start to shift and change, it’s also going to cause pretty widespread impacts for our lives.”
Growers of specialty crops remain particularly vulnerable. Row crop farmers like Lau use technology to adapt. Seed treatments allow soybean farmers to plant earlier and grow longer. This boosts their overall production.
“From purely a row crop production standpoint, the springs have been very favorable for us,” Lau said.
However, warmer weather brings more bugs to his fields.
“I raise all non-GMO corn, so I don’t have the insect traits bred into the corn,” Lau said. “That does concern me that we’re relying on what nature hands us.”
Farmers continue to innovate and adapt. Still, Trudeau emphasizes the urgent need to address climate change at its source.
“There is no substitute for dramatically reducing our carbon pollution,” she said.
The Narrative Matter in partnership, has permission to share This story, which is a product of the Mississippi River Basin Ag & Water Desk, an independent reporting network based at the University of Missouri in partnership with Report for America, with major funding from the Walton Family Foundation.
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