Invasive Bouncing Bet and Blue Mist Flower
Bouncing Bet: AKA Soapwort, Saponaria officinalis
Blue Mistflower: AKA Hardy Ageratum, Conoclinium coelestinum
I made the mistake of putting both these plants in a well-amended bed, and now I'm trying to get rid of them! I have found roots down 9" - 12". They have also traveled to neighboring lawn areas, but I'm much less concerned about that.
They are planted in a bed with other desirable plants, so I hesitate to use Round-Up, but I'm starting to think that may be my only choice.
Does anyone have any experience or ideas on how to get rid of these plants?