I just spent a vigorous hour in the garden pulling up great clumps of clustered bellflower (Campanula glomerata). It's a handsome plant that came to Ontario as a garden ornament, but it's as invasive as the Golden Horde with a strong tendency to crush everything in its path. So ... now the compost bin is full of it. For the rest of the summer, I shall pull up every flower spike I see before it can start spewing seeds around my tiny corner of the landscape.

I also have bugleweed and lily-of-the-valley, both equally invasive and difficult to expunge, but I like bugleweed and lily-of-the-valley, so that's okay. I'll cop to the hypocrisy.