The effect of late-season frost on a soybean crop depends upon the growth stage of the soybean plants. Yield losses due to frost are uncommon after soybeans have reached full maturity, the R8 growth stage. Temperatures that range from 30°F to 32°F can easily damage the top leaves on a soybean plant. When air temperatures drop lower than 30°F, the entire soybean plant can be killed. Fields with narrow-spaced rows (6 to 15 inches) seem to survive frost damage better than wide-spaced rows (30 to 38 inches) because of the limited air movement within the canopy.