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.
Sweet corn (Zea mays var. rugosa) is a warm-season crop that grows best at temperatures between 60 and 80 Â°F. Barbara H. Smith, Â©2016 HGIC, Clemson Extension. Plant sweet corn in rows 3 feet apart with 10 inches between seed in the row. Early, small varieties can be planted 8 to 9 inches apart in rows 30 inches apart.