University of Minnesota Extension corn agronomist Jeff Coulter feels weather after corn planting is more critical than the soil temperature. “For corn, we don’t need to wait until the soil temperature is 50 degrees for planting, we just need 50 degrees for germination to occur.” Problems arise if the soil temperature drops to the low 40s or below within one to two days after planting the corn. “If that happens, we can run into some issues with emergence and the need for replanting.” Proper soil conditions are also very important.
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