A trip to the American Peony Society yearly meeting and exhibition in Mansfield Ohio in the 1980’s-I cam home knowing I had to grow peonies. I also knew I would have a very tough time choosing which of a few I would grow. So I grew them like crops, in long grass-infested rows. I have no idea where this grass came from, nor do I know what grass it is. Do you? They did amazingly well with this less than ideal care. Peonies are very persistent and long lived. By the time I sold that first garden property, the patch probably had 400 peonies in it.