rlhvegas, I've used both White Labs and Wyeast Kolsch strains and you can use it at 60F, but your ferment will take a little longer and you will have higher diacetyl levels. I tend to go 65F for 10 days, rack to 2ndy hold at 65F for 14 days, then drop temp to 50F and hold for 14 days. With the...