Deep-green foliage and violet-blue flower spikes make 'Sunny Border Blue' Veronica (Veronica spicata 'Sunny Border Blue') especially engaging in the garden. If deadheaded regularly, the plant blooms all season long in sun or very light shade. It likes well-drained soil and grows to 24 inches tall by 18 inches wide. It's very effective planted at the front of the border and works best when mixed with flowers in the yellow-to-orange range of colors, as with the Butterfly Weed in this photo.