Does anyone out there know of any good field corn for very cold climates that are open pollinated. I live in northern Minnesota and our growing season is 65-75 days and it is slow to warm up in the spring. I am trying Minnesota 13 this summer. I have tried Roy's Calias Flint last year with some success. I need to harvest corn for chicken feed so silage won't cut it. Are there any other variates out there that you know about that are fast growing, open pollinated and can withstand cold temps? I am organic and don't plant any hybrids.