This presentation will help consultants, growers, and other practitioners in the mid-south and mid-west U.S. to better understand how to determine various vegetative and reproductive growth stages of indeterminate and determinate soybean. Information within this presentation illustrates why it is important to be able to determine soybean growth stages from one field to the next, as many in-season decisions with respect to pest management inputs are based on the presence, pressure, and/or thresholds of a specific or combination of pests at specific soybean growth stages throughout the growing season. Having a good understanding of soybean growth stages will aid in the process of making decisions on key production inputs such as pest management, irrigation timing and termination, and to estimate expected soybean maturity and anticipated timing of harvest.