Fall Garden

How many rhizomes of Immortality have you got, that you get flowers Every Autumn? I have at least 6, but they don't flower reliably each Autumn. Again & Again is not going to Fall bloom, although Scented Blue (my name) still is.

I started with 3 rhizomes 2 years ago, but they have multiplied, now at least a dozen but they continue to divide.

So with a doz, at least a couple should flower late.