kousa,
Thank You I know it has been close to 45 - 50 years (early 70's) since Mom and I first planted them. She had divided them a number of times over t he years. I am not sure how long since the last "thinning". I don't feel so bad about dividing them now. I will see about cutting the thin parts out before sharing them. I had wondered if last years flooding had harmed them.
