Figure 1-1. Soybean maturity zone map of the United States.
Map of eastern United States, minus Florida, showing soybean maturity zones.

Data from Mourtzinis, S., and S. Conley. (2017). "Delineating soybean maturity groups across the United States." Agronomy Journal 109: 1-7. 10.2134/agronj2016.10.0581