The problem I see with the new varieties is that increased yield has been sought for at the expense of winter hardiness and longevity. A 'less root, more shoot' cause. You used to be able to plow down a field of Grimm and hear the snapping of the tap roots as you sheared them off. You might not be able to get a second cut on Grimm every year, but at least it stayed in the ground for more than 3 years. I have also found evidence on a neighbours farm where broadcasted Grimm (by birds) germinated...something people say you cannot do with alfalfa. :cowboy: