.......because it came from my friendly neighbourhood Superstore (i.e. President's choice, i.e. Loblaws) garden centre. And because as a result I thought it must surely be "okay." The plant is morning glory. I was told at the centre that it is an annual, but "tends to seed itself." Coming home, I thought only to check the Internet for its preferred soil type, when I discovered that "tends to seed itself" is an understatement, and that I could easily spread it by breaking the root rhizomes during weeding. I've since painstakingly dug it up and put it in a pot and then back into the ground. Will this help to contain it? At least I discovered something about the English ivy (also on sale at aforesaid centre BTW) that my neighbour planted many years ago. Perhaps because our zone (5b/6a) or whatever, it didn't get as badly underway as one might expect. BUT, it was still hard going getting rid of it this evening (3 hours hot work.) Having once started research on invasive species, I am astounded to learn that: the Forget-me-nots, Bachelor's buttons, and possibly columbine my neighbour is so proud of are invasive. (I had notice the Bachelor's buttons strangling her peony, and the forget-me-nots reminding me of their existence in my gravel driveway.) Oh, did I mention that at Kent Building Supply AND PC garden centres, one can buy honeysuckle? (Looks disturbingly like the Japanese version that is allegedly invasive...) Also baby's breath.... Do major supermarket chains not use any qualified people to protect their customers from themselves? What can I do now? On the plus side, at least I now 'know' not to automatically trust garden centres!