These really took off! Started with only two in the beginning and if I recall right it was 2 years ago, now I
have 8, very pretty but I hope they are done multiplying as I don`t want them to overtake my other plants
I have there that bloom in summer.

Hi Linda, in the fall you may want to dig and separate those out so each has room to grow for next year's bloom. If you find you have too many you can always share with friends or do what I do: put them on the curb for free with name labels if possible. Mine always disappear within an hour, if not minutes!