Hayray, either I am not understanding your terminology or in our area the terminology is different. The only ryegrass we have in our area is the rye that is planted each fall and either pastured in the spring or cut for hay in the dough stage. It is called rye or ryegrass interchangeably and one of the main brands is Koolgrazer, although there are several different brands. No one cuts it for seed in this area. It is all rye and ryegrass is another word for it, but around here it is the same plant. Maybe I am just a little dense on this one.