Speedwell (Veronica teucrium Royal Blue) - A carefree, mound-forming Veronica. Long spikes of starry-shaped, rich gentian blue flowers are produced over tall, upright foliage. Grows best in full sun, but will tolerate partial shade. Veronica provide some of the clearest true blues available in perennials. Neat tidy plants have glossy foliage and will fill in without overpowering. Long-lasting color.