USA NPN National Phenology Network

Taking the Pulse of Our Planet

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USA National Phenology Network

The USA-NPN brings together volunteer observers, government agencies, non-profit groups, educators and students of all ages to monitor the impacts of climate change on plants and animals in the United States.


March 25th, 2021

Winter wheat is vulnerable to freezing temperatures once it reinitiates growth in the spring. Our new Winter Wheat Development Forecast, developed in collaboration with the USDA Climate Hubs, indicates the developmental stage of wheat to identify locations where cold temps might be damaging. Explore the Pheno Forecast.
Photo credit: USDA ARS

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