This popped up in a bed this summer that we don't have anything else growing in. My wife would like to plant more. I have several photos here. http://www.flickr.com/photos/27725102@N06/sets/72157607286255248/
Looks like Lobelia. Praps L. erinus. http://en.wikipedia.org/wiki/Lobelia http://www.botanypictures.com/plantimages/lobelia erinus 02.jpg
Lobelia erinus or one of several varieites of Lobelis bedding plants. These are widely available in garden stores (Pacific Northwest anyway) & dome in a variety of colours, often 2 tone. Search: Lobelia bedding plants or such.
