in hindsight, what invasives would you avoid?
I just gave a lady some free advice about variegated ribbon grass (phlaris something) at the Home Depot -- never again! She was planning on edging her annual beds with it... Other plants I would handle with caution, if at all are:
Plume poppy (sleeps the first year,then takes over the world)
Artemisia "Limelight" (be afraid, very afraid)
Artemisia "Valerie Finnis" (beautiful, but use carefully)
Knautia macedonica (very promiscuous, not worth the effort)
Gooseneck loosestrife (I love it, but it needs a firm hand)
Burgundy loosestrife (just keeps coming back...)
Any others we should know about?