Updated January 2015. The increased cost of health insurance is a central fact in any discussion of health policy and health delivery. As annual premiums edged beyond $16,800 for an average family, costs are blamed for rising uninsured and under-insurance..
Figure 1. Corn growth and temperature levels. Corn will germinate and grow slowly at about 50 F (10 C), but the average first spring planting dates across the U.S. usually begin when the average air temperatures reach 55 F (13 C) and soil temperature at seed depth is favorable for seedling growth.
Soil temperature is one of the best predictors of how long it will take corn to break the ground's surface. Soil temperature is usually 5 to 10 degrees cooler than air temperature, and soil temperature increases slower than air temperature in spring.ardeners usually plant corn (Zea mays) 10 days to two weeks after the last spring frost, when the soil temperature begins to warm.