Yep, my garden (Zone 4B - Ontario) is FULL of violets but I don't worry much - just pull out a few when they are in the wrong place. They are very pretty when mixed with sweet woodruff.

I have a deep pink scented violet - it blooms in the spring and again late fall. Can anybody take a stab at what it could be called?

Also - I have another violet (not scented) which I found growing between the cracks in a downtown sidewalk - honest! The flower is white with deep violet veins. I used a thin knife blade and a used coffee cup to bring it home. That was about 5 or 6 years ago, now it's everywhere! Anybody know the name of this? Thanks!