Spike speedwell (Veronica spicata) is an herbaceous perennial with spiked, tubular flowers. The flowers are a cool blue. The blue pops against the plant's dark green leaves. Speedwell also comes in pink.
Suited to sun as well as partial shade, my speedwell grows happily under a volunteer scrub willow. Low maintenance and low growing (it reaches 1.5 to 2 ft.), speedwell is a wonderful perennial to plant at the front edge of the flowerbed.
Pluses: Speedwell is deer resistant and attracts pollinators for the nearby vegetable garden. Rating: Excellent and easy care for Zone 5 growing.