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.
How Corn Grows. Whether you're raising field corn, popcorn or sweet corn, they all grow basically the same way. Once the seed or kernel is planted in an inch or two of soil, it germinates in 5 to 12 days, depending on the variety and the soil temperature.