Sorry Jim, I really DIDn't mean to scare you.
I forget which kind you have. Some of the hybrids are less invasive. Like Byron's Blue and such. But wait for a growing season, see how they behave, then make a decision. As for the root system, I don't know. I am in another world up here and still waiting for my passies to "get over it!" and grow with more vigor.
:^)))
