Veronica spicata "Romiley Purple" (Speedwell)
This lovely Veronica in the photo is not technically "Romiley Purple," but it is a purple Veronica spicata and the best I could come up with until mine bloom. By the way, the photo is by Stan Shebs, via Wiki Commons. "Romiley Purple" is popular in Europe but hasn't been seen a lot on this side of the pond. It is mat forming with flower spikes to about 18 inches and violet blooms. From what I hear, it is a blooming machine. It does stop at some point - it has to - when you should be sure to give it a shearing, and if you want to cut some spikes to take inside, do it in the morning before blooms are completely open. Veronica spicata "Romiley Purple" prefers full sun (although some shade is not out of the question), and well-drained soil. It is also low maintenance and, from what I can tell so far, makes a lovely plant with or without the colorful blooms. Zones 4-8. Quarts.