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.
While sweet corn needs soils around 60 degrees Fahrenheit for germination, field corn can withstand lower soil temperatures as long as the threat of frost has passed. Kernels should be spaced at least 12 inches apart with rows 3 feet apart, about 1/2 inch deep.