WL Alfalfa Fall Dormancy 4

Fall dormancy 4 is the standard winter-hardy choice for the Northern Corn Belt — these varieties go dormant early enough to harden off for winter without sacrificing yield potential during the growing season. Stand persistence in MN, WI, MI commonly exceeds 4 years on well-drained soils.

FD 4 in extremely cold winters (sub-zero with no snow cover) can still suffer winter injury — for the coldest pockets of northern Minnesota and Wisconsin, FD 2 or FD 3 with very high winter survival ratings is a safer pick. On poorly-drained soils, Aphanomyces and Phytophthora can shorten stand life regardless of FD.