I love forget-me-nots but they do have a habit of self-seeding all over the place. I had to stop Mr A from removing self-seeded Spanish Daisies from between the flag stones last year. They looked so pretty!
These forget-me-nots were in the middle of a path! The aquilegias and love in a mist has somehow selfset down at the allotment - I think every seed tray or plant pot prepared at home carries some of their seeds.