BHG top 20 perennials Speedwell The 7-inch spikes of speedwell (veronica) bloom atop 12- to 24-inch plants in shades of blue or red from early summer through fall. In the North, speedwell prefers sun, but it likes a bit of shade in the South. Plant speedwell at the front of the bed.
yarrow - easy to grow flowers ~ A tough and beautiful pick for any garden, Yarrow is an easy bet no matter how black your thumb may be. This plant thrives on neglect, loves poor soil, and blooms right through the summer.The foliage is ferny and lower to the ground, but the flower stalks can be anywhere from twelve inches, to four feet off the ground! It is attractive out of flower, starts early in the spring/summer, and keeps going through the fall.