Euphorbia invasive question
I have a beautiful Euphorbia 'Garblesham Enchanter' I got from Heronswood in 2004, and this year I am finding many, many volunteer seedlings from it.
Is this going to be an invasive plant problem?
I adore having a few "free" plants, but I don't want to unleash a problem species on our neighborhood! (My neighborhood is rural Skagit County in Washington.)