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.
Related: When to plant corn in central Midwest. That's kind of a magic number, 50 degrees, for planting corn, observes Jim Fawcett, an Iowa State University Extension field agronomist in eastern Iowa. That's when corn will germinate, with a soil temperature of 50 degrees or higher.The reason for not planting before that is the seed actually will take up water with soil temperatures cooler than 50 degrees.The seed will swell, but it doesn't germinate.hat's kind of a magic number, 50 degrees, for planting corn, observes Jim Fawcett, an Iowa State University Extension field agronomist in eastern Iowa. That's when corn will germinate, with a soil temperature of 50 degrees or higher.